Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Fix screens inherited from PaginatedProjectScreen
  Upgrade GWT to version 2.8.2
  Bump GWT version to 2.8.0
  Bump GWT version to 2.8.0-rc2

Change-Id: I23b9a2f3f0d8af1a6ab005766850af4df310f5a3