Allow FX MIDI to pass through when using device as input #33
Description
If MIDI input is set to a device (not <FX input>), that doesn't mean we need to stop ReaLearn from passing MIDI messages through. "Let unmatched events through" should be checkable. By default it should be checked. For compatibility reasons, it should be unchecked for presets/projects using previous ReaLearn versions. "Let matched events through" can be grayed out as there never are matched events from FX input with this setting.