add shortcuts

plugins/c9.ide.ace/ace.js

@@ -617,7 +617,7 @@ define(function(require, exports, module) {
             
             commands.addCommand({
                 name: "toggleWordWrap",
-                bindKey: {win: "", mac: ""},
+                bindKey: {win: "Ctrl-Q", mac: "Ctrl-W"},
                 exec: function(editor) {
                     editor.setOption("wrap",  editor.getOption("wrap") == "off");
                 }, 

plugins/c9.ide.tree/tree.js

@@ -103,7 +103,7 @@ define(function(require, exports, module) {
             commands.addCommand({ 
                 name: "focusTree", 
                 // shortcut can be modified here 
-                bindKey: { mac: "", win: ""}, 
+                bindKey: { mac: "Shift-Esc", win: "Shift-Esc"},
                 exec: function() { 
                     panels.activate("tree"); 
                     plugin.focus();