feat(edit): raise beginCellEdit in timeout

allows complex editors time to render so they can properly attach to the beginCellEdit event

Author: swalters

Diff for: src/features/edit/js/gridEdit.js

@@ -774,7 +774,10 @@
               });
 
               $scope.$broadcast(uiGridEditConstants.events.BEGIN_CELL_EDIT, triggerEvent);
-              $scope.grid.api.edit.raise.beginCellEdit($scope.row.entity, $scope.col.colDef, triggerEvent);
+              $timeout(function () {
+                //execute in a timeout to give any complex editor templates a cycle to completely render
+                $scope.grid.api.edit.raise.beginCellEdit($scope.row.entity, $scope.col.colDef, triggerEvent);
+              });
             }
 
             function endEdit() {