Textview allows mouse down events to go to superview.
- Cards can now change their card type. [DONE]
	- Thread can now change their thread type [DONE]
	- Smoother card drag ~ [Done]  Note: the grip always reverts to the left hand top corner.
	- Stop the creation of cards / threads [Done]
	- Thread Type Creation now has warning [Done]
	- mouse downs in text views now make the card selected [Done]