Hide tab/pane immediately when closing last tab of pane and setting to keep pane is off

package.json

@@ -80,7 +80,7 @@
         "c9.ide.ace.split": "#0ae0151c78",
         "c9.ide.ace.statusbar": "#2155083cf6",
         "c9.ide.ace.stripws": "#cf0f42ac59",
-        "c9.ide.behaviors": "#6530a20004",
+        "c9.ide.behaviors": "#13d2c56564",
         "c9.ide.closeconfirmation": "#cee4674141",
         "c9.ide.configuration": "#a9066299a2",
         "c9.ide.dialog.wizard": "#7667ec79a8",

plugins/c9.ide.editors/pane.js

@@ -103,23 +103,30 @@ define(function(require, module, exports) {
                         emit("afterClose", event);
                         
                         if (tab.aml.$amlDestroyed) {
-                            tab.unload(e);
+                            tab.unload(event);
                             closing--;
                         }
+                        else if (tab.meta.$skipAnimation) {
+                            closeNow();
+                        }
                         else {
                             tab.aml.on("afterclose", function(){
-                                if (tab.meta.$closeSync) {
-                                    tab.unload(e);
-                                    closing--;
-                                }
-                                else {
-                                    setTimeout(function(){
-                                        tab.unload(e);
-                                        closing--;
-                                    });
-                                }
+                                closeNow();
                             });
                         }
+                        
+                        function closeNow(){
+                            if (tab.meta.$closeSync) {
+                                tab.unload(event);
+                                closing--;
+                            }
+                            else {
+                                setTimeout(function(){
+                                    tab.unload(event);
+                                    closing--;
+                                });
+                            }
+                        }
                     },
                     overactivetab: true,
                     childNodes: [

plugins/c9.ide.editors/tab.js

@@ -304,7 +304,7 @@ define(function(require, module, exports) {
                 if (rule)
                     ui.removeStyleRule(rule, stylesheet);
                 // If there are no more pages left, reset location
-                var last = amlPane.getPages().length === 0;
+                var last = e.last || amlPane.getPages().length === 0;
                 if (last)
                     apf.setStyleClass(amlPane.$ext, "empty");