Bug resolved in displaying image thumbnails in collection panel for a resource

* Previously:
In Collection panel on left side of the page, was not displaying image thumbnails when we make the image collection. Since the area defined for displaying thumbnail was not proper. 

* Resolved : 
Now collection of images shows the thumbnails in collection panel. Defined proper size to display thumbnail.
Also moved the list elements of collection panel at left side to make the utilization of space, and removed the header tag defined for collection elements.