0.19.7

• NEW Groove length parameter
• NEW Project master scale and root
• NEW Accumulator for Poly mode. Accumulator engine works per step. Individual notes can be excuded from accumulation by setting them to Locked.
• Improve multiple step edit
• Improve Instrument definition import by ignoring not supported parameters like NRPN
• Fix Load project from SD card
• Fixes and improvements in PERF user chords for Poly
• Fix avoid sending note twice from isomorphic keyboard
• 0.19.7: Fix glitch in Project menu
• 0.19.7: Fix ACCUM trigger None, used when the Accumulator is set to Track so a step can change the accumulated track value without altering its own pitch.