[WIP] VolumeMeter cleanup + paint optimizations maybe

Author: Warchamp7

frontend/widgets/VolControl.cpp

@@ -98,7 +98,7 @@ VolControl::VolControl(obs_source_t *source, bool vertical, QWidget *parent)
 	bool muted = obs_source_muted(source);
 	bool unassigned = isSourceUnassigned(source);
 
-	volMeter->muted = muted || unassigned;
+	volMeter->setMuted(muted || unassigned);
 
 	setLayoutVertical(vertical);
 	setName(sourceName);
@@ -694,7 +694,7 @@ void VolControl::updateMixerState()
 	bool showAsMonitored = monitoringType != OBS_MONITORING_TYPE_NONE;
 	bool showAsUnassigned = !muted && unassigned;
 
-	volMeter->muted = (showAsMuted || showAsUnassigned) && !showAsMonitored;
+	volMeter->setMuted((showAsMuted || showAsUnassigned) && !showAsMonitored);
 
 	// Qt doesn't support overriding the QPushButton icon using pseudo state selectors like :checked
 	// in QSS so we set a checked class selector on the button to be used instead.