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
For now just use the rules file in lib/ve, but eventually
this will be a preset.
Change-Id: I7fd79d3e1dce37aef066d416cd969e5fff1e962f
Depends-On: I17e0d23ddfedf64985495ab35d113ea08c03b1df
The cited reasons were that the the logo and search bar
have a z-index of 3, but that doesn't matter as they are
nested in other elements with z-indexes.
Change-Id: I7ff279efe7c01ba1ffb1fa0d460d59a493ccc47a