Add key storage toggle to Encryption settings (#29310)

* Add key storage toggle to Encryption settings

* Keys in the acceptable order

* Fix some tests

* Fix import

* Fix toast showing condition

* Fix import order

* Fix playwright tests

* Fix bits lost in merge

* Add key storage delete confirm screen

* Fix hardcoded Element string

* Fix type imports

* Fix tests

* Tests for key storage delete panel

* Fix test

* Type import

* Test for the view model

* Fix type import

* Actually fix type imports

* Test updating

* Add playwright test & clarify slightly confusing comment

* Show the advnced section whatever the state of key storage

* Update screenshots

* Copy css to its own file

* Add missing doc & merge loading states

* Add tsdoc & loading alt text to spinner

* Turn comments into proper tsdoc

* Switch to TypedEventEmitter and remove unnecessary loading state

* Add screenshot

* Use higher level interface

* Merge the two hooks in EncryptionUserSettingsTab

* Remove unused import

* Don't check key backup enabled state separately

as we don't need it for all the screens

* Update snapshot

* Use fixed recovery key function

* Amalgamate duplicated CSS files

* Have "key storage disabled" as a separate state

* Update snapshot

* Fix... bad merge?

* Add backup enabled mock to more tests

* More snapshots

* Use defer util

* Update to use EncryptionCardButtons

* Update snapshots

* Use EncryptionCardEmphasisedContent

* Update snapshots

* Update snapshot

* Try screenshot from CI playwright

* Try playwright screenshots again

* More screenshots

* Rename to match files

* Test that 4S secrets are deleted

* Make description clearer

* Fix typo & move related states together

* Add comment

* More comments

* Fix hook docs

* restoreAllMocks

* Update snapshot

because pulling in upstream has caused IDs to shift

* Switch icon

as apparenty the error icon has changed

* Update snapshot

* Missing copyright

* Re-order states

and also sort out indenting

* Remove phantom space

* Clarify 'button'

* Clarify docs more

* Explain thinking behind updating

* Switch to getActiveBackupVersion

which checks that key backup is happining on this device, which is
consistent with EX.

* Add use of Key Storage Panel

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

* Change key storage panel to be consistent

ie. using getActiveBackupVersion(), and add comment

* Add tsdoc

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

* Use BACKUP_DISABLED_ACCOUNT_DATA_KEY in more places

* Expand doc

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

* Undo random yarn lock change

* Use aggregate method for disabling key storage

in https://github.com/matrix-org/matrix-js-sdk/pull/4742

* Fix tests

* Use key backup status event to update

* Comment formatting

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

* Fix comment & put check inside if statement

* Add comment

* Prettier

* Fix comment

* Update snapshot

Which has gained nowrap due to 917d53a56f

---------

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

test/test-utils/test-utils.ts

@@ -151,9 +151,11 @@ export function createTestClient(): MatrixClient {
                 },
             }),
             isCrossSigningReady: jest.fn().mockResolvedValue(false),
+            disableKeyStorage: jest.fn(),
             resetEncryption: jest.fn(),
             getSessionBackupPrivateKey: jest.fn().mockResolvedValue(null),
             isSecretStorageReady: jest.fn().mockResolvedValue(false),
+            deleteKeyBackupVersion: jest.fn(),
         }),
 
         getPushActionsForEvent: jest.fn(),
@@ -192,6 +194,7 @@ export function createTestClient(): MatrixClient {
         }),
         mxcUrlToHttp: jest.fn().mockImplementation((mxc: string) => `http://this.is.a.url/${mxc.substring(6)}`),
         setAccountData: jest.fn(),
+        deleteAccountData: jest.fn(),
         setRoomAccountData: jest.fn(),
         setRoomTopic: jest.fn(),
         setRoomReadMarkers: jest.fn().mockResolvedValue({}),