- properly list MIDI devices in CVWidgetEditor resp. CVWidgetMSEditor after MIDIClient.init
- bugfix: don't remove CCResponders if classvar removeResponders is false

Signed-off-by: nuss <st9fan@gmail.com>
CCResponder().learn wasn't working dur to the fact that though MIDIClient.init was executed MIDIIn.connectAll had to be executed as well

Signed-off-by: nuss <st9fan@gmail.com>