Check for all node classes in getOffsetFromTextNode(), not just
branches and aliens (an entity is neither)
Render entities with contenteditable=false. Without this, selection was
still broken, because:
Foo|€Bar was really <p>Foo<span>|€</span>Bar</p> which maps correctly.
Foo€|Bar was really <p>Foo<span>€|</span>Bar</p> which maps to the same,
which is incorrect.
With cE=false, the cursor can't be inside the span, so we get:
Foo|€Bar is really <p>Foo|<span>€</span>Bar</p> which maps correctly.
Foo€|Bar is really <p>Foo<span>€</span>|Bar</p> which maps correctly.
Change-Id: Iaf603346590a9ad553c152565eb203136be7a399
<span typeof="mw:Entity"> tags are now correctly represented in the
model, and rendered in CE. There are still issues with cursor movement
etc. in CE.
Because the prioritization mechanism for annotations vs nodes is broken
in the current "node API", I had to hack two special cases for mw:Entity
into the converter. I also had to change the converter to ignore the
children of inline nodes (this was a legitimate bug, but had never come
up before).
Change-Id: Ib9f70437c58b4ca06aa09f7272bf51d9c41b18f2
