Use new Mainstream and Plus lists
Make some scrollbars easier to use on desktops
Add feature to select a specific call to Practice
Update C-1 and C-2 definitions
More animations for Tandem concept
Accordion lists for grouping calls with many animations
Fix animations for Single Circle to a Wave and Tandem Box Recycle
Sequencer:
	Code for Pair Off
	Better logic for Spread as used in C-1
	Fix some cases of dancers excessively turning
	Fix some uses of Rally