* Applies small changes to code block display in timeline
* Makes the composer code block look like the timeline display, but without line numbers
* Adds a button to allow code blocks to be implemented
* Adds tests for the new button
* adds buttons to toggle bulleted and numbered lists on and off
* adds icons for those buttons
* css changes to timeline display
* adds tests for the new buttons, refactors existing tests
Adds maplibre as a dependency, and behind a labs flag, lets users send and receive [MSC3488](https://github.com/matrix-org/matrix-doc/blob/matthew/location/proposals/3488-location.md) style location shares - with backwards compatibility with old school `m.location` `msgtype` location shares too.
For this to work, you have to define a valid maptile server and API in your config.json's `map_style_url`.
We're anticipating development of polls soon, so for efficiency reasons we're getting the labs flag in early. If something goes wrong with the plan, this whole change will be reverted.
This removes all images we no longer reference in the app. This should be safe,
as Webpack only adds images to the build output if they are referenced.
