Chaser on multiple vccuelist

I'm on a quest of eliminating bugs in the virtual console...

Changes here:


a chaserrunner is bound to a chaser, not anything else
-> fix inconsistent behavior with multiple vccuelists / button + vccuelist
-> fix crashes due to the inconsistent behavior
(liveedit vc) -> link a vccuelist to an already running chaser looks OK


Also, some reworks of chaser/chaserrunner internals
-> fix memory leaks
-> fix possible chaserrunner concurrent access crashes with a mutex



see https://sourceforge.net/p/qlcplus/discussion/development/thread/a685f422