We wrap a `<div>` tag around the `<h2>`, and move some elements there.
The markup is inspired by and compatible with my proposal for T13555.
The "ext-discussiontools-init-section" class is moved to the `<div>`.
A small patch is needed in MobileFrontend to preserve the section
collapsing functionality: I11bff21e81046898ca63f3f432797129fa70ad88.
The following elements are now outside of `<h2>`:
* Metadata bar
* Subscribe button
* Ellipsis menu (only shown on mobile)
The following elements are sadly still inside of `<h2>`:
* Subscribe links (only shown on desktop)
* Section edit links from MediaWiki core
Trying to move them mucks up the CSS too much. I hope we can resolve
this later as a part of the work on T13555.
Depends-On: I11bff21e81046898ca63f3f432797129fa70ad88
Bug: T314714
Change-Id: I0bbdcfa02c334858737855349d7a35746de1d8f2
This changes a vast number of test expected-outputs because it affects
the order of the keys when serialized.
Bug: T315400
Change-Id: I6ad2cded6ba7cb2cc5e5ba37ea60f4b18ecc26be
Move the code that generates these wrapper nodes and attributes
from postprocessReplyTool() (only called when reply tool is enabled)
to addDiscussionToolsInternal (always called).
This undoes some changes from 31c57d594a and 980b2c38bc.
Bug: T314707
Change-Id: I07ed210375d494047670015410430c087d67f21a
