Re-label the headings in the MWFormatDropdownTool with MW-specific
headings per bug 43334, reduce the size of the dropdown's contents a
little to make the headings less vibrant, and move the H1 option to the
end of the list to further discourage its use.
Note that there are some issues with the underlying structure here and our
ability to split the repos into VE-core and VE-MW will need this to be
refactored.
Bug: 43334
Change-Id: I5a58b4dcebd6ceae0ffcd24f663429f25bdc3db9
Heading and Preformatted nodes have rules that should only
exist under a document node in MediaWiki.
Two new node types have been created as has a new DropdownTool which
uses these. The MW init options have been changed to use the new
DropdownTool.
Bug: 45295
Change-Id: I3f47e1ae1f5c1415bde58a75385e4bf5f4b8fffc