ungrab_button/3
ungrab_button(+ButtonUngrab, +ModifiersMask, +UngrabWindow)
Releases the passive button/key combination grab on the specified window, if it was grabbed by the client. It has no effect on an active grab.
ButtonUngrab is the pointer button to be released, possible values are:
any_button
ModifiersMask is one of:
modifiers_mask/2
is useful to translate between
modifier specifications and bitmasks.
any_modifier
UngrabWindow is the ProXL window where the grab is in effect.