Pattern and instrument drag & drop preview#1699

Draft

cme wants to merge 4 commits intohydrogen-music:masterfrom cme:dev-drag-drop-preview

+169-4

Commits on Dec 27, 2022

Preview dragging instruments in Pattern Editor
cme
committed

Commits on Dec 28, 2022

Commits on Feb 5, 2023

Merge branch 'master' into dev-drag-drop-preview
cme
committed