Lots of fixes for shelf contents config dialog:      - No more "ghosted" list items when removing from the Selected List.      - Localized the loading of available/selected gadgets to cut down code duplication.      - General code cleanup (remove extra comments)
Lots of fixes for shelf contents config dialog:
     - No more "ghosted" list items when removing from the Selected List.
     - Localized the loading of available/selected gadgets to cut down code duplication.
     - General code cleanup (remove extra comments)

jordemort/e17,jordemort/e17,jordemort/e17