fix a cce in pub
Improve gitRef code.
More cleanup and refactoring.
Write remoteRefs whenever fetched.
Fix bug in creating refPaths.
Add support to update remoteRefs in fetch
Update remoteHead async, when requested.
More cleanup.
fix.
Remove old remote refs when updating.
disable creating branch from other than master.
Fix Remove action on topLevelFile.
Add missing types in spark.dart.
Add more types in spark.dart.
add missing types in workspace.
Add more missing types.
Testing deleting app
Implemented _sendDeleteApprequest
Show folder picker before any create operation in workspace.
Merge pull request #2389 from dart-lang/add_missing_types

[code maintenance] Add missing types