Define $editableContent on target construction, and mark
all non-ancestor nodes between that at the target container
as uneditable (50% opacity, no pointer events).
Bug: T58289
Change-Id: I7fe51104bd5aa1bd53ffc604e5f02752c7553578
Place things like the page title and redirect link inside a new
container $originalContent, which is appended to the surface
when ready. Replace margins with padding in various places.
This will allow us to surface-height-matching sidebar for dialogs.
Change-Id: I60d80fb303bdaf93e9d121f62d534ee3a3056e59
* Use local edit source tool, and emit event to MF
* Bring in toolbar styles, bonus: remove old desktop style hacks
Bug: T96186
Change-Id: I89351e409aa4e9d626edd7151ae05bdcd58f1cee