This cuts the render time in half (from ~448ms to ~200ms on my account) per received event, as we're no longer re-mounting the entire room list and instead just the section(s) we care about.
Previously we were firing updates for everything, which is bad. This has an effect of causing the room list to update itself every time the user goes to toggle some account settings.
This is to fix an issue where when using both the community filter panel and the search box it's an AND rather than further refining the results.
This makes the search box further refine the community filter panel results.
For https://github.com/vector-im/riot-web/issues/13635
This is an incomplete implementation and is mostly dumped in this state for review purposes. The remainder of the features/bugs are expected to be in more bite-sized chunks.
This exposes the RoomListStore on the window for easy access to things like the new filter functions (used in debugging).
This also adds initial handling of "new rooms" to the client, though the support is poor.
Known bugs:
* [ ] Regenerates the entire room list when a new room is seen.
* [ ] Doesn't handle 2+ filters at the same time very well (see gif. will need a priority/ordering of some sort).
* [ ] Doesn't handle room order changes within a tag yet, despite the docs implying it does.
