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.component.js

@@ -575,7 +575,7 @@ angular.module('patternfly.views').component('pfListView', {
           }
           nextElement = nextElement.parentElement;
         }
-      });
+      }, 100);
     };
 
     ctrl.itemClick = function (e, item) {