PopupFrame will automatically be marked for removal if not focused.
For the new I/O, this is done by overriding the toRemove mark; the old backend does this from the tree action.
True if the PopupFrame was marked for removal, or if it has no focus.
See Implementation
PopupFrame will automatically be marked for removal if not focused.
For the new I/O, this is done by overriding the toRemove mark; the old backend does this from the tree action.