chore(uiGrid): Dereg styleComp. $watch on $destroy

Author: c0bra

src/js/core/directives/ui-grid.js

@@ -134,16 +134,16 @@
         }
       }
 
+      var styleWatchDereg = $scope.$watch(function () { return self.grid.styleComputations; }, function() {
+        self.grid.refreshCanvas(true);
+      });
+
       $scope.$on('$destroy', function() {
         dataWatchCollectionDereg();
         columnDefWatchCollectionDereg();
+        styleWatchDereg();
       });
 
-      $scope.$watch(function () { return self.grid.styleComputations; }, function() {
-        self.grid.refreshCanvas(true);
-      });
-
-
       self.fireEvent = function(eventName, args) {
         // Add the grid to the event arguments if it's not there
         if (typeof(args) === 'undefined' || args === undefined) {