Description of problem:
There is no horizontal scroll bar on the albums list, so if the albums list is
too wide you have to expand the pane instead of just being able to scroll across.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create a hierarchical album tree wider than the "My Albums" pane
No horizontal scroll bar when the pane contents extends beyond the right hand
side of the pane.
Horizontal scroll bar should appear at the bottom of the "My Albums" pane.