call fewer ace methods
fix push dialog.
Merge pull request #2223 from dart-lang/fix_push_dialog

fix push dialog.
Fix committing empty untracked folders.
Merge pull request #2224 from dart-lang/empty_untracked_folders

Fix committing empty untracked folders.
Merge pull request #2163 from devoncarew/devoncarew_ace_tweaks

call fewer ace methods
cleanups redux
Merge pull request #2226 from devoncarew/devoncarew_cleanups

cleanups redux
Update status for folders.
Merge pull request #2228 from dart-lang/update_folder_status

Update status for folders.
Merge branch 'master' into fix_update_index