Updates to InteractivePage editing.
Updates to InteractivePage editing.

* Removes commented-out best_in_place tags
* Updates markup to avoid nested p tags in page intro text.
* Page attribute editing is triggered with 'Edit' buttons, not by clicking (for [#37953317])
concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara