Dashboard PNG export (#6644)

vendor/phantomjs/render.js

@@ -55,7 +55,8 @@
 
         var rootScope = body.injector().get('$rootScope');
         if (!rootScope) {return false;}
-        return rootScope.panelsRendered;
+        var panels = angular.element('div.panel:visible').length;
+        return rootScope.panelsRendered >= panels;
       });
 
       if (panelsRendered || tries === 1000) {