Collection drawer updated

* As to improve the collection performance only included names in left collection drawer rather than fetching entire node.

* Since previously all nodes are getting fetched when we tab on collection in left drawer, 

* Now we can see the little enhancement while opening in collection drawers. 

* Also it will get improved by some time when we complete shelf part , to include the shelf items in left collection drawer. Since shelf items will be very less will not face any problem regarding collections.