Fader/Rotary: Initialized all members
MidiSenseWidget/MidiTable: Renamed members/init all members
Cli: Add nullpointer check to playlist event
Logger: removed dead code from switch statement
Synth: init member
midi_action: rename and init member
IO: fixed member initialization of audio and midi drivers
ADSR: fix member initialization
Sample.cpp: Code cleanup; removed unneccessary if conditions