process super-collapsed content

Content within a super-collapsed block that was lazy-loaded
wasn't being processed for images and quoted text like initially
expanded content. Most images were caught by the regexp anyway,
but we need this step for completeness, and so quoted text
isn't out of control.

Patch up other cases of content replacement to hide images as
well.

Bug: 7392191
Change-Id: Ib784ce52c9c477635a125f261a2b9717b20887d2
1 file changed