Also fixes some errors in I752705f6
And while we're there, clean up some mostly duplicate functions
Bug: 57169
Bug: 57170
Bug: 57171
Bug: 57172
Change-Id: I1e3dca3868a267e91bccb0ae277012c26ca82174
Add meta items for the four remaining mwPageProp behavioural flags from Parsoid
that are added by MediaWiki core. These are each waiting for UX implementation,
based on the lack of context information in MWMetaDialog about the page, or
about the wiki:
* __NOGALLERY__
* __HIDDENCAT__
— These only make sense in a Category: page.
* __NOTITLECONVERT__ // __NOTC__
* __NOCONTENTCONVERT__ // __NOCC__
— These only make sense on wikis that have content or title conversion.
Change-Id: I752705f65cfbd79c7f3f71270659793996868aff
