Merge branch 'master' into stable-4.4

Merge branch 'master' into stable-4.4

* master:
  Create push wizards in CommitJob in UI thread
  Fix NPE in AbstractRebaseCommandHandler$1.done()
  Fix NPE in GitSelectRepositoryPage.refreshRepositoryList()
  Fix NPE in PushBranchWizard.startPush()
  Fix NPE in ResourceUtil.isSharedWithGit()
  Catch IOException in ConfigureGerritAfterCloneTask
  Replace uses of deprecated Repository.getRef()
  Ensure Git is closed using try with resource
  Check HandlerUtil.getActiveSite(event) result to avoid NPE's
  Prepare 4.3.2-SNAPSHOT builds
  Ensure compatibility with pre-Mars Eclipse
  Update Orbit repository to S20160518051658 for Neon RC2
  Relayout buttons after enabling check for warnings
  Add accelerators for "Compare With" and "Replace With" commands
  New convenience commands to compare/replace with Gitflow develop
    branch
  Mark branding plugin and gitflow plugin as singletons
  [releng] p2.inf to remove the old importer fragment
  [findBugs] Fix potential NPE in RepositoryMapping
  Remove duplicate rename branch dialog
  [findBugs] Avoid unnecessary boxing when parsing int from String
  Replace use of deprecated Repository.getRef() method
  Ensure Git is closed using try with resource
  Remove unnecessary @SuppressWarnings("resource")
  Exclude labels from tab stop
  Mark current feature-branch and prevent attempted re-checkout
  Ignore SmartImportWizardTest
  [releng] Include missing extension point schemas in EGit binaries
  [releng] Importer fragment must have host bundle version constraint
  Leave the commit message enabled in staging view
  Adapt target platform to changed Neon staging p2 repository
  [releng] Importer fragment must have host bundle version constraint
  Topic input on PushToGerritPage
  Add "Open in Commit Viewer" in context menu of stashed commit
  Handle linked resources in the same repository
  Refactor code: simplification, and avoid findbugs warning
  Set repository when opening staging view from commit action
  Test stability: one "widget disposed" message is enough
  EGit v4.3.1.201605051710-r
  Test stability: really shut down repositories
  Fix typo in testcase name
  Fix wrong cursor position while editing URIs
  Test stability: wait for repositories view refresh after config change
  [memory leak] make sure we only allow one GitHistoryPageSource
    instance
  Prevent NPE in ProjectUtil.getProjectsUnderPath(IPath)

Change-Id: I13ee8cfb7648a356dfca9e2c86b9ffb5d92ebe84
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>