SCIPHONE-1746 Adding a bounce to the navigation bar. Have to solve for the tab end state and the container disappearing.
Changed the drawer animations to be a spring animation. Need to check the cancel area for expanding the menu as I don't think the math is quite right.
Smoothed out some of the origin positioning, and added a delegate to set the top extension background color seen when the drawer bounce occurs.
Fixed the math on the drop area for opening and closing the menu to reflect the correct percentage moved, not the current frame as that didn't really work with negatives the way it was set up.