add scrollbar min width

node_modules/ace/lib/ace/scrollbar.js

@@ -98,6 +98,7 @@ var VScrollBar = function(parent, renderer) {
     this.width = dom.scrollbarWidth(parent.ownerDocument);
     this.inner.style.width =
     this.element.style.width = (this.width || 15) + 5 + "px";
+    this.$minWidth = 0;
 };
 
 oop.inherits(VScrollBar, ScrollBar);
@@ -124,7 +125,7 @@ oop.inherits(VScrollBar, ScrollBar);
      * @returns {Number}
      **/
     this.getWidth = function() {
-        return this.isVisible ? this.width : 0;
+        return Math.max(this.isVisible ? this.width : 0, this.$minWidth || 0);
     };
 
     /**

package.json

@@ -55,7 +55,7 @@
         "c9"
     ],
     "c9plugins": {
-        "c9.ide.language": "#ff78609c3f",
+        "c9.ide.language": "#2a4a36fc18",
         "c9.ide.language.css": "#a649f2a710",
         "c9.ide.language.generic": "#77d43cfaf0",
         "c9.ide.language.html": "#0f4078c187",
@@ -106,7 +106,7 @@
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#61dcbd0180",
         "c9.ide.save": "#e00549cb0f",
-        "c9.ide.scm": "#0bccfb982b",
+        "c9.ide.scm": "#b07648109a",
         "c9.ide.terminal.monitor": "#b76f1c9f24",
         "c9.ide.test": "#9cbf45fb56",
         "c9.ide.test.mocha": "#3126bb6416",

plugins/c9.ide.tree/tree.js

@@ -278,9 +278,9 @@ define(function(require, exports, module) {
             tree.renderer.on("scrollbarVisibilityChanged", updateScrollBarSize);
             tree.renderer.on("resize", updateScrollBarSize);
             function updateScrollBarSize() {
-                var w = tree.renderer.scrollBarV.getWidth();
+                var scrollBarV = tree.renderer.scrollBarV;
+                var w = scrollBarV.isVisible ? scrollBarV.getWidth() : 0;
                 btnTreeSettings.$ext.style.marginRight = Math.max(w - 2,  0) + "px";
-                tree.renderer.scroller.style.right = Math.max(w, 10) + "px";
             }
             
             tree.on("drop", function(e) {