fix styling of autocompletion popup

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

@@ -127,11 +127,7 @@
 }
 
 .code_complete_text .ace_text-layer{
-    left : 1px;
-    right : 1px;
-    width : auto;
-    top : 1px;
-    bottom : 1px;
+    margin: 1px!important;
 }
 
 .code_complete_text .ace_line{

plugins/c9.ide.language.core/completedp.js

@@ -64,8 +64,8 @@ define(function(require, exports, module) {
         if (!this.ignoreGenericMatches || !match.isGeneric) {
             var simpleName = match.replaceText.replace("^^", "").replace(/\(\)$/, "");
             if (name.indexOf(simpleName) === 0) {
-                this.dom.buildDom(["span", { class: "main" + trim }, 
-                    ["u", prefix], simpleName.substring(prefix.length),
+                this.dom.buildDom([["span", { class: "main" + trim }, 
+                    ["u", prefix], simpleName.substring(prefix.length)],
                     ["span", { class: "deferred" }, name.substring(Math.max(simpleName.length, prefix.length))]
                 ], lineEl);
             }

plugins/node_modules/ace/lib/ace/autocomplete/popup.js

@@ -135,8 +135,6 @@ var AcePopup = function(parentNode) {
         var row = popup.getRow();
         var t = popup.renderer.$textLayer;
         var selected = t.element.childNodes[row - t.config.firstRow];
-        if (selected == t.selectedNode)
-            return;
         if (t.selectedNode)
             dom.removeCssClass(t.selectedNode, "ace_selected");
         t.selectedNode = selected;