Set start point of LFO

It would be helpful if the LFO for tremolo, synth arpeggios, arp-delay etc could be restarted with a single press of the tap-tempo footswitch.

Basically so the LFO restarts every time you press the footswitch, unless the current press happens within a percentage (e.g. 210%) of the-current-tempo-amount-of-time.