Potentially addresses +10116

package.json

@@ -106,7 +106,7 @@
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#61dcbd0180",
         "c9.ide.save": "#4a4a60a004",
-        "c9.ide.scm": "#aabd0d181e",
+        "c9.ide.scm": "#7b0c0714b4",
         "c9.ide.terminal.monitor": "#b76f1c9f24",
         "c9.ide.test": "#26cd260224",
         "c9.ide.test.mocha": "#f6cc482886",

plugins/c9.ide.ui/lib/page.js

@@ -1205,6 +1205,8 @@ apf.BaseTab = function(){
                     node.$button.style.zIndex = 0;
             }
             
+            if (!(node.relPage || node).$ext) return onfinish();
+            
             if (pages.length == 1)
                 (node.relPage || node).$ext.style.display = "none";