WL job #19484

- Move 'Fly to voxel on click' menu item;
- add shortcut for muting audio ...
Rename mute menu
add script number to menu items so that we can run multiple copies of same script
added scriptEnding callback
added count example
Merge branch 'master' of https://github.com/worklist/hifi into 19484
fixes for avatar paddle-hands, plus some hackery for demo
Merge branch 'master' of ssh://github.com/highfidelity/hifi into paddle-fixes
adding back log about mismatching packet type
Fixed mouseVoxel getting resized all the time when flying over smaller voxel
Merge branch 'master' of https://github.com/worklist/hifi into 19484
Merge pull request #1576 from Atlante45/master

Fixed mouseVoxel getting resized all the time when flying over smaller voxels
Merge pull request #1573 from stojce/19484

Code Review for Job #19484
Re-enabling particle-avatar collisions.
Cleanup of "soft hand paddle" collision hackery.  Still a hack, but more commented and readable.
Hand now holds a ball a bit forward, which prevents the body from colliding with the ball on throw.
Removing menu option for where to hold the ball -- we always hold from the finger tip (approximately).
Merge pull request #1585 from AndrewMeadows/paddle-fixes

Paddle fixes
Remove unused variables, change orbit pitch behavior (closes #1582).
Got the sign backwards.