Resolved the bug regarding editing resources.

Previously it was getting huge time to open an edit page for every resource if that group consists of more than 500 resources in it.  since previously, when we go for editing resourse it loads all those records from that group which is required in prior_node as well as collection drawers. 

So, we came to the decision that , untill the user clicks on prior node as well as collection tab those contents will not load while we edit the resource. 
Now when we click on prior node or collection tab it goes for an ajax call and processes the drawer elements for that app.