Multiple independent pattern tabs
Requested by @HermanRoyce, moved to separate issue by me.
An "add" button that creates a new tab that outputs its own independent pattern(s) on a different midi channel (up to 16 channels/tabs, or at least 4 like Stochas has built-in) - like creating a new instance of LibreArp but contained within the original instance to make it easy to access and change, ideally with each instance's/tab's midi channel able to be nominated, and each instance/tab with its own independent time signature, loop length, snap - everything.