Destroy modal panel in blur handlers
Merge pull request #284 from Kangaroopower/master

Dont run onsidetoggled if tree view is off. Fixes #272
Add spec for toggling tree-view's side while it's hidden
Merge pull request #289 from atom/mb-fix-panel-remnant

Destroy modal panel in blur handlers
Prepare 0.139.0 release
Merge pull request #1 from atom/master

update