Test build 14: SLOOP 2.4.1 + PRESETS by kind

SLOOP 2.4.1 plus one addition: hold HOME and turn PRESETS to jump a kind at a time, and a KIND knob on the PRESETS page (branch kind-jump, commit 48cb1bb). The FM-1 shows 2.4-KIND1 BETA under HOME menu → ABOUT. Not a SLOOP release. Coming from a 2.3-DX7 test build: back up with the editor first; 2.4 stores its FM6 bank and the USR4 sample slot where the DX7 banks were, so those banks are gone after this install — re-import the .syx files through the editor's Import SysEx.