Add explicit $timeout delay for determining drop direction

In #setDropMenuLocation, the bounding rectangle for the menu was being
calculated before it was rendered causing the height to be 0.

For some reason the $timeout was not waiting for the digest cycle to
complete, however, adding a 100 ms delay consistently drops the menu in
the proper direction.

Fixes #399

Author: jjlangholtz

src/views/listview/list-view-directive.js

@@ -559,7 +559,7 @@ angular.module('patternfly.views').directive('pfListView', function ($timeout, $
               }
               nextElement = nextElement.parentElement;
             }
-          });
+          }, 100);
         };
       },