Mark as Unread (#12254)

* Support the mark as unread flag

* Add mark as unread menu option

and make clering notifications also clear the unread flag

* Mark as read on viewing room

* Tests

* Remove random import

* Don't show mark as unread for historical rooms

* Fix tests & add test for menu option

* Test RoomNotificationState updates on unread flag change

* Test it doesn't update on other room account data

* New icon for mark as unread

* Add analytics events for mark as (un)read

* Bump to new analytics-events package

* Read from both stable & unstable prefixes

* Cast to boolean before checking

to avoid setting state unnecessarily

* Typo

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Doc external interface (and the rest at the same time)

* Doc & rename unread market set function

* Doc const exports

* Remove listener on destroy

* Add playwright test

* Clearer language, hopefully

* Move comment

* Add reference to the MSC

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Expand on function doc

* Remove empty beforeEach

* Rejig badge logic a little and add tests

* Fix basdges to not display dots in room sublists again

and hopefully rename the forceDot option to something that better
indicates what it does, and add tests.

* Remove duplicate license header (?)

* Missing word (several times...)

* Incorporate PR suggestion on badge type switch

* Better description in doc comment

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Update other doc comments in the same way

* Remove duplicate quote

* Use quotes consistently

* Better test name

* c+p fail

---------

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

package.json

@@ -67,7 +67,7 @@
     },
     "dependencies": {
         "@babel/runtime": "^7.12.5",
-        "@matrix-org/analytics-events": "^0.10.0",
+        "@matrix-org/analytics-events": "^0.12.0",
         "@matrix-org/emojibase-bindings": "^1.1.2",
         "@matrix-org/matrix-wysiwyg": "2.17.0",
         "@matrix-org/olm": "3.2.15",