update commit panel when needed (part 1 of 2)

package.json

@@ -109,7 +109,7 @@
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#9956689819",
         "c9.ide.save": "#4cda35bfdb",
-        "c9.ide.scm": "#f2200f788c",
+        "c9.ide.scm": "#3a3e21ac42",
         "c9.ide.terminal.monitor": "#1a4092ede2",
         "c9.ide.test": "#102942ae4e",
         "c9.ide.test.mocha": "#fc053b23d2",

plugins/c9.ide.panels/panel.js

@@ -382,6 +382,11 @@ define(function(require, module, exports) {
                  */
                 get button(){ return button; },
                 
+                /**
+                 * 
+                 */
+                get active(){ return panels.isActive(plugin.name); },
+                
                 _events: [
                     /**
                      * Fires when the panel is drawn.