A workflow that switches Mask by Touch off, for example to find a thing by
its name instead, showed ComfyUI's red "Prompt has no outputs" message when
a new picture was loaded. The node still asked for its own look at the
picture, and ComfyUI leaves a bypassed or muted node out of every run, so
that run had nothing left to do.
- The node sends no run of its own while it is bypassed or muted, by hand,
by a Workflow Switches card, or inside a box that is.
- A look it skipped that way is made up when it is on again and the
pointer comes to its picture.
- A click while it is switched off says so on the node.
isSwitchedOff in js/shared/graph_ids.mjs answers for the node and for every
box on the way to it, with tests.