Patch Set 2: I would prefer that you didn't submit this

I have to take back my previous +1: the patch removes property keys but it leaves the constants in UIText. This results in many warnings when starting, like e.g.

!ENTRY org.eclipse.osgi 2 1 2011-11-15 14:58:07.861
!MESSAGE NLS missing message: SynchronizeFetchJob_TaskName in: org.eclipse.egit.ui.uitext