allow to set bIgnoreNops, bTrack and bPersist from ControlPotmeter
Inline and de-virtualize methods in ControlObjectThread since there are no more subclasses!
Don't populate waveform zoom options in slotUpdate.
Inline another method in ControlObject.
Moved set and setDefault in ControlPotmeter from setRange to constructor.
It is not expecte to be in setRange in loadEffect()
Moved config saving after desposing all COs, this allows to use persistant COs
Make master and headphone delay persistant
Merge pull request #235 from daschuer/persistant_co

Persistant co
Merge remote-tracking branch 'mixxx/master' into keylock-configure

Conflicts:
	src/dlgprefsound.cpp