Added notifications when receiving presets, and when entering manual mode
Added alerts when recording/sending presets without an associated MIDI in/out device

Fixed sliders being slightly offset when beginning a drag
Fixed “copy” & “duplicate” not working properly when the preset wasn't made active beforehand
Fixed filter field text drawing issues
Fixed sending Sysex automatically when restoring the window
Fixed various presets folder monitoring issues (deadlock, crashes…)
Restored titlebar window dragging functionality when showing a sheet