Add stable unstable version (`org.matrix.msc3030.stable`) for jump to date [before `v1.6` is fully supported on a homeserver](https://github.com/matrix-org/synapse/issues/15089).
Related to https://github.com/vector-im/element-web/issues/24362 but does not solve immediately because Synapse does not supply `org.matrix.msc3030.stable` yet
Also refactored `ServerSupportUnstableFeatureController` to support multiple feature groups where any one of them will enable the setting. All features in a feature group are required. This way having either `org.matrix.msc3030` or `org.matrix.msc3030.stable` will enable the jump to date feature flag with a config of `[["org.matrix.msc3030"], ["org.matrix.msc3030.stable"]]`
* Apply `strictNullChecks` to `src/components/views/room_settings/*`
* Restore tsconfig.json
* Conform more code to `strictNullChecks`
* Iterate
* Update matrix-widget-api
* Conform more code to `strictNullChecks`
* add poll history tab to room settings
* test poll history in room settings
* remove posthog tracking for poll his
* remove labs flag for poll history
* i18n
* add poll history tab to room settings
* test poll history in room settings
* remove posthog tracking for poll his
* use consistent label for polls history
* basic sync setup
* formatting
* get loudest value for synced rules
* more types
* test synced rules in notifications settings
* type fixes
* noimplicitany fixes
* remove debug
* tidying
* extract updatePushRuleActions fn to utils
* extract update synced rules
* just synchronise in one place?
* monitor account data changes AND trigger changes sync in notifications form
* lint
* setup LoggedInView test with enough mocks
* test rule syncing in LoggedInView
* strict fixes
* more comments
* one more comment
* add error variant for caption component
* tests for new error message
* tweak styles
* noImplicitAny
* revert out of date prettier changes to unrelated files
* limit inline message to radios only, tests
* strict fix
* Fix start DM with pending third party invite
* Make the fix more clearly visible
---------
Co-authored-by: Janne Mareike Koschinski <jannemk@element.io>
Co-authored-by: Janne Mareike Koschinski <janne@kuschku.de>
(cherry picked from commit d53e91802d)
