BL-647: upgrading to jquery-ui-1.11.2 fixes this problem

(which was caused by a bug in jquery-ui1.10.3)
BL-757: final fixes to delete/duplicate menu items

- Both disabled if book is locked down
- Use Confirm dialog for delete
- Use 'Remove' consistently in Confirm dialog
BL-816: Start Book colors off at a random place with each run.
Merge pull request #188 from JohnThomson/deleteDupCleanup

BL-757: final fixes to delete/duplicate menu items
Fix wrong icon in Linux (BL-779)

In release builds we occasionally tried to set the icon before
the handle was created. Due to a mono bug this didn't work.
This change sets the icon after the handle got created.
Merge pull request #189 from BloomBooks/BL816BookColors

BL-816: Start Book colors off at a random place with each run.
Merge pull request #184 from ermshiperete/BL-779

Fix wrong icon in Linux (BL-779)
Merge pull request #187 from JohnThomson/jqueryUi1.11.2

Fix BL-647: box jumps down when dragged if page is scrolled (by upgrading jquery-ui)
A few non-code tweaks