Merge pull request +8590 from c9/fix-login-screen

fixes a bug when user is undefined

package.json

@@ -106,6 +106,7 @@
         "c9.ide.run.build": "#ad45874c88",
         "c9.ide.run.debug.xdebug": "#3b1520f83d",
         "c9.ide.save": "#58b8616a88",
+        "c9.ide.scm": "#undefined",
         "c9.ide.terminal.monitor": "#b0b4d03280",
         "c9.ide.theme.flat": "#2de8414db7",
         "c9.ide.threewaymerge": "#229382aa0b",