Fixes incomplete tags showing when switching to edit a different post
Fixes incomplete tags showing when switching to edit a different post

closes #3065
- send 'reset' action to PostTagsInputController when associated view is destroyed

TryGhost/Ghost-Admin,dbalders/Ghost-Admin,kevinansfield/Ghost-Admin,JohnONolan/Ghost-Admin,dbalders/Ghost-Admin,airycanon/Ghost-Admin,TryGhost/Ghost-Admin,acburdine/Ghost-Admin,airycanon/Ghost-Admin,acburdine/Ghost-Admin,kevinansfield/Ghost-Admin,JohnONolan/Ghost-Admin