c042c67011
Intersect mode needs to set everything **outside** of the selection mask to non-selected and leave the rest untouched. We already had the comment to "un-set all elements not in the mask" but that was actually unsetting **everything**. In theory, we could also early out for `SEL_OP_AND` since the following `apply_mask_as_` calls are not doing anything for `SEL_OP_AND` really (but left the change to be minimal). Pull Request: https://projects.blender.org/blender/blender/pulls/134400