use user-select mixin everywhere

plugins/c9.ide.ace.statusbar/skin.xml

@@ -72,9 +72,7 @@
                 cursor              : pointer;
                 position            : relative;
                 cursor              : default;
-                -moz-user-select    : none;
+                .user-select(none);
-                -khtml-user-select  : none;
-                user-select         : none;
                 background-position : 0 0;
                 background-repeat   : no-repeat;
                 margin: @ace-status-icon-margin !important;

plugins/c9.ide.collab/timeslider/timeslider.css

@@ -320,9 +320,7 @@
 }
 
 #ui-slider-handle when(@time-slider-handle-basic = false) {
-    -webkit-user-select: none;
+    .user-select(none);
-    -moz-user-select: none;
-    user-select: none;
 }
 
 #ui-slider-handle span when(@time-slider-handle-basic = false){
@@ -382,9 +380,7 @@
 }
 
 #ui-slider-bar {
-    -webkit-user-select: none;
+    .user-select(none);
-    -moz-user-select: none;
-    user-select: none;
     cursor: pointer;
     height: 35px;
     margin-left: @time-slider-bar-margin-left;

plugins/c9.ide.find.replace/skin.xml

@@ -6,9 +6,7 @@
                 height             : 22px;
                 cursor             : pointer;
                 position           : absolute;
-                -moz-user-select   : none;
+                .user-select(none);
-                -khtml-user-select : none;
-                user-select        : none;
                 width              : 20px;
             }
             .btnquicksearchnav .lbl{

plugins/c9.ide.language.core/complete.css

@@ -216,7 +216,5 @@
 /* allow selecting in doc popup but do not elsewhere */
 .panelsbar, .btnsesssioncontainer, .bar-status, .splitgrabber, 
 .code_complete_text, .ace_scrollbar, .ace_tree {
-    -webkit-user-select: none;
+    .user-select(none);
-    -moz-user-select: none;
-    user-select: none;
 }

plugins/c9.ide.layout.classic/less/browser-btn.less

@@ -9,11 +9,7 @@
     background-position : 0 27px;
     background-repeat   : no-repeat;
     background-image    : url("@{image-path}/browser_button.png");
-    -moz-user-select: -moz-none;
+    .user-select(none);
-    -khtml-user-select: none;
-    -webkit-user-select: none;
-    -o-user-select: none;
-    user-select: none;
 }
 
 .browser-btn span{

plugins/c9.ide.layout.classic/less/button.less

@@ -5,11 +5,7 @@
     cursor             : default;
     position           : relative;
     line-height        : 17px;
-    -moz-user-select: -moz-none;
+    .user-select(none);
-    -khtml-user-select : none;
-    -webkit-user-select: none;
-    -o-user-select: none;
-    user-select        : none;
 }
 
 .btn.smallbtn {

plugins/c9.ide.layout.classic/less/c9-menu-bar.less

@@ -1,13 +1,7 @@
 .c9-menu-bar {
     position      : relative;
     overflow      : visible;
-    -moz-user-select: -moz-none;
+    .user-select(none);
-    -khtml-user-select: none;
-    -webkit-user-select: none;
-    -o-user-select: none;
-    user-select: none;
-    // margin: 0;
-    // overflow: hidden;
 }
 .c9-menu-bar:before{
     position: absolute;
@@ -185,9 +179,7 @@
     width: 10px;
 }
 .c9-menu-bar .c9-mbar-bcont .c9-activity.saving .light{
-    -webkit-animation: saving .4s linear 0 infinite;
+    animation: saving .4s linear 0 infinite;
-       -moz-animation: saving .4s linear 0 infinite;
-            animation: saving .4s linear 0 infinite;
 
     background-position: -102px 0px !important;
 }

plugins/c9.ide.layout.classic/less/c9-menu-btn.less

@@ -14,10 +14,7 @@
     text-shadow   : @menu-button-text-shadow;
     
     
-    -webkit-user-select: none;
+    .user-select(none);
-       -moz-user-select: none;
-        -ms-user-select: none;
-            user-select: none;
 }
 
 .c9-menu-btnOver {

plugins/c9.ide.layout.classic/less/c9-toolbarbutton.less

@@ -6,11 +6,7 @@
     position           : relative;
     line-height        : 17px;
     border:1px solid transparent;
-    -moz-user-select: -moz-none;
+    .user-select(none);
-    -khtml-user-select : none;
-    -webkit-user-select: none;
-    -o-user-select: none;
-    user-select        : none;
 }
 
 .with-arrow.c9-toolbarbutton {

plugins/c9.ide.layout.classic/less/editor_tab.less

@@ -249,11 +249,7 @@ body>.session_btn.curbtn{
     white-space : nowrap;
     overflow : hidden;
     padding  : @pane-button-title-padding;
-       -moz-user-select: -moz-none;
+    .user-select(none);
-     -khtml-user-select: none;
-    -webkit-user-select: none;
-         -o-user-select: none;
-            user-select: none;
     color : @pane-button-color;
     text-shadow : @pane-button-textshadow;
     // position: relative;

plugins/c9.ide.layout.classic/less/frame.less

@@ -23,10 +23,7 @@
     color: @frame-title-color;
     background-color: @frame-title-background;
     background-image: linear-gradient(90deg, @frame-title-gradient-start 0%, @frame-title-gradient-stop 100%);
-    -webkit-user-select: none;
+    .user-select(none);
-    -moz-user-select: none;
-    -ms-user-select: none;
-    user-select: none;
 }
 .frame>.title:hover{
     background-image: linear-gradient(90deg, @frame-title-gradient-hover-start 0%, @frame-title-gradient-hover-stop 100%);

plugins/c9.ide.layout.classic/less/header-btn.less

@@ -60,10 +60,6 @@
     position: absolute;
     top: 0;
     width: 2px;
-    -moz-user-select: -moz-none;
+    .user-select(none);
-    -khtml-user-select: none;
-    -webkit-user-select: none;
-    -o-user-select: none;
-    user-select: none;
 }
     

plugins/c9.ide.layout.classic/less/lesshat.less

@@ -5,29 +5,6 @@
 //  Petr Brzek & Jan Kuca
 
 
-//  @GlobalConfig
-
-//  @GlobalConfig
-
-  // Config supported browsers for your project
-
-    @w3c: true; // Unprefixed W3C syntax
-    @webkit: true; // Chrome 7+, Safari 5+, iOS5, Android
-    @moz: true; //  Firefox 4+
-    @opera: true; // Opera 10.5+
-    @ms: true;  // IE 10+
-
-  // Signals
-
-    @webkitSignal: 1;
-    @mozSignal: 2;
-    @operaSignal: 3;
-    @msSignal: 4;
-    @w3cSignal: 5;
-
-
-
-
 //  .size
 
   .size(@square){
@@ -48,27 +25,10 @@
 //  .user-select
 
   .user-select(@arguments:auto){
-
+    -webkit-user-select: @arguments;
-      //  Local config for disabling properties
+    -moz-user-select: @arguments;
-
+    -ms-user-select: @arguments;
-      @webkitLocal: true; // Chrome 7+, Safari 5+, iOS5, Android
+    user-select: @arguments;
-      @mozLocal: true; //  Firefox 4+
-      @msLocal: true;  // IE 10+
-
-      .result (@arguments, @signal, @boolean, @localBoolean) when (@boolean = true) and (@localBoolean = true) {
-        .inception (@signal, @arguments) when (@signal = 1) { -webkit-user-select: @arguments; }
-        .inception (@signal, @arguments) when (@signal = 2) { -moz-user-select: @arguments; }
-        .inception (@signal, @arguments) when (@signal = 4) { -ms-user-select: @arguments; }
-        .inception (@signal, @arguments) when (@signal > 5),(@signal < 1) { error: "Signal is out of range"; }
-        .inception(@signal, @arguments);
-      }
-      .result (@arguments, @signal, @boolean, @localBoolean) when not (@boolean = true), not (@localBoolean = true) { }
-
-      .result(@arguments, @webkitSignal, @webkit, @webkitLocal);
-      // --  this comment must be here because of LESS bug
-      .result(@arguments, @mozSignal, @moz, @mozLocal);
-      // --
-      .result(@arguments, @msSignal, @ms, @msLocal);
   }
 
    //   element{ .user-select(text); }
@@ -93,7 +53,7 @@
     background-image: ~`(function(){ return "url(@{filename}.@{extension})" + ("@{important}" == "true" ? ' !important' : '');})()`;
     background-repeat: @repeat;
 
-    @media print, (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 1.25dppx) {
+    @media (-webkit-min-device-pixel-ratio: 1.25), (min-resolution: 1.25dppx) {
         background-image: ~`(function(){ return "url(@{filename}@2x.@{extension})" + ("@{important}" == "true" ? ' !important' : '');})()`;
         background-size: ~`(function(){ return "@{width} @{height}" + ("@{important}" == "true" ? ' !important' : '');})()`;
     }

plugins/c9.ide.scm/diff/conflictmarker.css

@@ -57,11 +57,7 @@
 .ace_button {
     margin-left: 2px;
     cursor: pointer;
-    -webkit-user-select: none;
+    .user-select(none);
-    -moz-user-select: none;
-    -o-user-select: none;
-    -ms-user-select: none;
-    user-select: none;
     overflow: hidden;
     border: 1px solid rgba(100,100,100,0.23);
     padding: 2px 4px;

plugins/c9.ide.test/style.css

@@ -22,10 +22,7 @@
     color: #795A0A;
     margin: 0 5px;
     pointer-events:auto;
-    -webkit-user-select: text;
+    .user-select(text);
-    -moz-user-select: text;
-    -ms-user-select: text;
-    user-select: text;
 }
 .stack-message.more{
     cursor:pointer;