Implement gap checklist #137
Description
th2 and th4+ games provide gap checklist feature. thug+
Initial idea is to hook gap award func and get name from there, then store it in some list.
on menu access, parse nodearray and find if triggerscript contains gap award, then take name from there.
if gap is not present on the "got gap" list, make entry static.
other games of course have manually baked lists per level.