dart-lang/spark — pull request #2161 by umop (2014-05-29 03:10:02+00:00)
Title: Added multiple cursors checkbox to settings dialog and attached to ace editor. 

- Added multiple cursors checkbox to settings dialog and attached to ace editor.
- Switched preferences from PreferenceStore to SparkPreferences instance.
- Began to implement cancelable click-to-definition (to change preference during session), but it caused spurious errors, so put in a todo and required restart to change preference.

Review @devoncarew