For the multiroom module, we display several room views at the same
time. In order to avoid all the rooms to send read receipts and markers
automatically when we are interacting with the UI, we add
`enableReadReceiptsAndMarkersOnActivity` props.
When at false, the timeline doesn't listen to user activity to send
these receipts. Only when the room is focused, marker and read receipts
are updated.
...with somewhat placeholder names as they're the best I can think of right now:
* 'Extras': To add new bits of UI to places (specifically the space panel)
* 'Builtins': For modules to render components that are part of Element Web
* 'Navigation': For modules to add paths to the URL router
Florian Duros