[BISERVER-8409] fixed merge issue with hidden themes, they no longer
will appear in the PUC UI.
[BISERVER-8412] updated copy paste logic to consider titles, which
results in the extension being removed from the user view.
[BISERVER-8412] adjusted copy paste logic to deal with some subtle
issues when copying between folders, the previous logic would skip the
prefix and go straight to the increment when copying to a different
folder.
Merge pull request #88 from wgorman/master

Fixes for BISERVER-8409 and BISERVER-8412