Merge pull request #472 from bytekast/BISERVER-8847

[BISERVER-8847] Folder Context Actions in Browse Perspective
BISERVER-9050 - Added ThemeableImageButton object that uses css classes for images.
Moved more images to common theme areas.
Made more icons theme-able in PUC
Merge pull request #474 from rfellows/dev

BISERVER-9050 - Added ThemeableImageButton object that uses css classes for images
[BISERVER-8847] Retrieve clicked folder name from model.