Considerations:
* Using the same edit notices as VisualEditor, except 'anoneditwarning'
* No extra frame/styling is added (on Wikimedia wikis, the notices
often already have them)
* 'talkpagetext' message is not shown (on Wikimedia wikis, they are
mostly about signing your posts with tildes, which is not necessary)
Bug: T269033
Change-Id: Idc5ff29f093c75a14c3a3479888295d5bf630f6d
Longer, but follows the style guide and less likely to conflict.
We need to account for init classes in the cache being around for
a while.
Change-Id: I738bc93393850db320fdbda2b003ca8ac40556da
1. Extend the JS modifier to allow adding top-level comments
(that is, replies to headings). PHP modifier doesn't do this
because we'll save the changes using paction=addtopic instead.
2. Subclass CommentController to allow adding a new heading and a
top-level comment underneath it at the same time.
3. A lot of ugly code in ReplyWidget to customize the interface
for this case. Much of it should probably be moved to
CommentController/NewTopicController.
Bug: T267595
Change-Id: I9c707bb7f7aae1b92c72fb4dee436490f8c8409b
