Marks a layer element as active (active: true). The element stays mounted
either way — the flag is purely keyboard-side: on the next sync the keyboard
adapter puts the element's ID back into the layer's activeElements set, so
the keyboard engine resumes dispatching key events to the element's bindings
without the screen system touching the keyboard engine directly.
Marks a layer element as active (
active: true). The element stays mounted either way — the flag is purely keyboard-side: on the next sync the keyboard adapter puts the element's ID back into the layer'sactiveElementsset, so the keyboard engine resumes dispatching key events to the element's bindings without the screen system touching the keyboard engine directly.