Bug
1550030 - Part 1: Implement the DOM mutation breakpoint context menu items in the markup view. r=loganfsmyth,jdescottes
This implements the context menu items for the DOM mutation breakpoint.
In addition, there were some server changes to:
- Update the mutationBreakpoints form for the NodeActor
- Expose the mutationBreakpoints form
- Moved the setMutationBreakpoints method from the Node spec to Walker spec
since the Node spec only consisted of getter methods. It made more sense
that the setter went into the Walker spec to be more consistent with how
the Walker and Node spec have been arranged.
Unit tests will be followed up in Part 2 immediately.
Differential Revision: https://phabricator.services.mozilla.com/D36074