Add fade-out animation to BubbleView when closing it
Add BubbleView setting to automatically close on losing focus
Merge pull request #18 from nmichaud/bubble-fade

Add fade-out animation to BubbleView when closing it
Start work on fixing up the bubble view
rename to popup view
Update the popup view implementation to support more features.
Merge pull request #21 from nucleic/bubble-fix

Bubble fix
Update the position of the popup when the parent is moved or resized.
Merge branch 'master' into feature-dock-window
Update the title bar interface and add some comments
Use the window destroy method instead of the closing it directly
Update the layout handling functions to handle dock windows
Unregister the frame from the manager and issue a deferred delete on
frame destroy
Update the dock manager to support docking of floating dock windows
Save and restore the splitter sizes as needed when making layout
modifications.

This prevents non-deterministic resizing of splitters during plugging and
unplugging of dock items from the layout.
Initial cut at getting the close button working for the dock window.