Fix clicking on "+" button not working when a tab was underneath

We were mistakenly pushing an opaque layer without intersecting it
with the content mask. Also, we were pushing two opaque layers for
the same div unnecessarily.
b0ee7b2fb9Antonio Scandurra committed on 12/21/2023, 1:28:06 PMparentb38a095
1 file changedLine totals unavailable