make the action buttons for rebaseline server stick to the top of the window as you scroll

gm/rebaseline_server/static/loader.js

 /*
  * Loader:
  * Reads GM result reports written out by results.py, and imports
  * them into $scope.extraColumnHeaders and $scope.imagePairs .
  */
 var Loader = angular.module(
     'Loader',
     ['ConstantsModule']
 );
 
@@ skipping 273 matching lines @@
                   (baseUrl.indexOf('://') == -1)) {
                 imageSet[baseUrlKey] = $scope.resultsToLoad + '/../' + baseUrl;
               }
             }
           );
 
           $scope.readyToDisplay = true;
           $scope.updateResults();
           $scope.loadingMessage = "";
           $scope.windowTitle = "Current GM Results";
+
+          $timeout( function() {
+            make_results_header_sticky();
+          });
         }
       }
     ).error(
       function(data, status, header, config) {
         $scope.loadingMessage = "FAILED to load.";
         $scope.windowTitle = "Failed to Load GM Results";
       }
     );
 
 
@@ skipping 713 matching lines @@
      */
     $scope.getImageDiffRelativeUrl = function(imagePair) {
       var before =
           imagePair[constants.KEY__IMAGEPAIRS__IMAGE_A_URL] + "-vs-" +
           imagePair[constants.KEY__IMAGEPAIRS__IMAGE_B_URL];
       return before.replace(/[^\w\-]/g, "_") + ".png";
     }
 
   }
 );