Cappuccino Cappuccino

Final fixes for popovers as child windows

• Fixed case where a dangling transition function was left when closing a popover.
• Fixed case where closing a popover, moving the target view, then reopening the same popover would not reposition the popover when resizing the target view's window.
• Optimized repositioning of popover on target view change.
• Implemented transitional popovers via trapped mouse down events.
• Implemented dequeue: argument of CPApplication -setTarget:selector:forNextEventMatchingMask:untilDate:inMode:dequeue: and -setCallback:forNextEventMatchingMask:untilDate:inMode:dequeue:.
• Fixed some child window behavior when ordering/closing.
• Eliminated no longer necessary window close notification in CPPopover.
• Fixed window title in theme so it doesn't dim when window is main but not key. https://github.com/cappuccino/cappuccino/commit/fdbef474f0b24b2cdb5...