Blacklist all VisualEditor contentEditables, not just the main one

With the introduction of table editing support, ULS is now activating
on table cells, which have contentEditable=true, but do not have
the ve-ce-documentNode class. So instead, expand the blacklist to
include all descendants of .ve-ce-surface.

Bug: 72824
Change-Id: I974d7ab2726bbe15606f43d7713627eed623435e
Merge "Blacklist all VisualEditor contentEditables, not just the main one"