Merge branch 'master' into stable-4.8

Merge branch 'master' into stable-4.8

* master:
  Change confirm hard reset dialog Yes- and No-button label
  Don't auto-share for closed projects or for bare repositories
  Prevent NoWorkTreeException in GitProjectData
  Fix NPE in RepositorySelectionPage
  Fix NPE in RepositorySelectionPage
  Set focus when context menu in staging view appears
  Adds mnemonics to the buttons in the git staging view
  Remove defaultHandlers for CommitEditor commands
  CommitEditor: fix check-out button display
  Change discard local changes dialog OK-button label

Change-Id: Iba126b875689381b1214c826f816fe61d08cd574
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>