fix +6401 language info icons are on top of breakpoints markers

plugins/c9.ide.ace/style.less

@@ -97,6 +97,9 @@
     .image-2x(@ace-warning, 16px, 16px, no-repeat);
     background-position: 3px 0px;
 }
+.ace_gutter-layer .ace_gutter-cell.ace_info when not (@ace-info = "") {
+    .image-2x(@ace-info, 16px, 16px, no-repeat);
+}
 .ace_gutter-layer .ace_gutter-cell.ace_breakpoint {
     .image-2x(@ace-breakpoint, 16px, 16px, no-repeat);
     background-position: 3px center;

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

@@ -2268,8 +2268,8 @@
 }
 
 .image-2x(@image; @width; @height; @repeat: no-repeat; @important: false) {
-    @filename  : ~`/(.*)\.(jpg|jpeg|png|gif)/.exec(@{image})[1]`;
-    @extension : ~`/(.*)\.(jpg|jpeg|png|gif)/.exec(@{image})[2]`;
+    @filename  : ~`/(.*)\.(jpg|jpeg|png|gif)|$/.exec(@{image})[1] || ""`;
+    @extension : ~`/(.*)\.(jpg|jpeg|png|gif)|$/.exec(@{image})[2] || ""`;
     background-image: ~`(function(){ return "url(@{filename}.@{extension})" + ("@{important}" == "true" ? ' !important' : '');})()`;
     background-repeat: @repeat;
 

plugins/c9.ide.layout.classic/themes/default-dark-gray.less

@@ -69,6 +69,7 @@
 @ace-status-label-hover-color: @ace-status-color;
 @ace-status-label-active-color: @ace-status-color;
 
+@ace-info: "";
 @ace-error: "@{image-path}/ace_error_light.png";
 @ace-warning: "@{image-path}/ace_warning_light.png";
 @ace-breakpoint: "@{icon-path}/debugger/brkp_obj.png";

plugins/c9.ide.layout.classic/themes/default-dark.less

@@ -69,6 +69,7 @@
 @ace-status-label-hover-color: @ace-status-color;
 @ace-status-label-active-color: @ace-status-color;
 
+@ace-info: "";
 @ace-error: "@{image-path}/ace_error_light.png";
 @ace-warning: "@{image-path}/ace_warning_light.png";
 @ace-breakpoint: "@{icon-path}/debugger/brkp_obj.png";

plugins/c9.ide.layout.classic/themes/default-flat-light.less

@@ -69,6 +69,7 @@
 @ace-status-label-hover-color: darken(#333, @darken-chrome);
 @ace-status-label-active-color: darken(#63acff, @darken-chrome);
 
+@ace-info: "@{theme-image-path}/ace_info_flat_light.png";
 @ace-error: "@{image-path}/ace_error_flat_light.png";
 @ace-warning: "@{image-path}/ace_warning_flat_light.png";
 @ace-breakpoint: "@{theme-icon-path}/debugger/brkp_obj_flat_light.png";

plugins/c9.ide.layout.classic/themes/default-light-gray.less

@@ -69,6 +69,7 @@
 @ace-status-label-hover-color: @ace-status-color;
 @ace-status-label-active-color: @ace-status-color;
 
+@ace-info: "";
 @ace-error: "@{image-path}/ace_error_light.png";
 @ace-warning: "@{image-path}/ace_warning_light.png";
 @ace-breakpoint: "@{icon-path}/debugger/brkp_obj.png";

plugins/c9.ide.layout.classic/themes/default-light.less

@@ -69,6 +69,7 @@
 @ace-status-label-hover-color: @ace-status-color;
 @ace-status-label-active-color: @ace-status-color;
 
+@ace-info: "";
 @ace-error: "@{image-path}/ace_error_light.png";
 @ace-warning: "@{image-path}/ace_warning_light.png";
 @ace-breakpoint: "@{icon-path}/debugger/brkp_obj.png";

plugins/c9.ide.layout.classic/themes/flat-light.less

@@ -330,10 +330,6 @@
     display: none;
 }
 
-.ace_gutter-cell.ace_info{
-    .image-2x("@{theme-image-path}/ace_info_flat_light.png", 16px, 16px, no-repeat, true);
-}
-
 .c9-toolbarbutton-glossy .c9-icon {
     height: 20px;
 }