tinkerlevu

This could also tie in with #139 and #173 and possibly the Midi Output Channels bit of #29

The only thing I've found so far is https://github.com/RomanKubiak/ctrlr But both helio and carla don't seem to recognise it on my system.

OMG OMG..! I **FINALLY** Found Something That Works!!! https://github.com/falkTX/JackAss *(its only for [Jack Audio](https://jackaudio.org/) soo...) ¯\\\_\(ツ\)\_\/¯*

How about using the phrase `Close all others` or `Close others` ?

> done. I agree, 'close others' is a better name for it, but it still looks a bit broken. This is going to need a CSS expert to fix... @dan-giddins...