Replace checkboxes with Compound checkboxes, and appropriately label each checkbox. (#29363)

* Fix labelling of avatar menu

* Make the integration manager toggle more clear.

* fix label

* lint

* Update snapshots.

* Refactor many cases of checkbox to use the new compound component.

* Remove non-checkbox related changes

* Reset some things

* Remove usages of mx_checkbox* styling.

* Use label locators for apperance tests.

* small linter tweaks

* lint

* update screenshot

* Test updates

* lint

* Realign checkboxes for device selection.

* Fixup QuickSettings styling

* remove comment

* lint

* flex comment

* remove unused label

* remove redundant classes

* add test for spaces

* lint

* Copyright

* fixup spaces test

* spaces lint

* Replace pin with compound pin.

* Realign icons

* Remove hack for colouring icons

* Adjust existing rooms component to correctly label room.

* Add test for adding an existing room to an existing space.

* Set deterministic sort order for rooms

* lint

res/css/_components.pcss

@@ -128,7 +128,6 @@
 @import "./views/dialogs/_AddExistingToSpaceDialog.pcss";
 @import "./views/dialogs/_AnalyticsLearnMoreDialog.pcss";
 @import "./views/dialogs/_BugReportDialog.pcss";
-@import "./views/dialogs/_BulkRedactDialog.pcss";
 @import "./views/dialogs/_ChangelogDialog.pcss";
 @import "./views/dialogs/_CompoundDialog.pcss";
 @import "./views/dialogs/_ConfirmSpaceUserActionDialog.pcss";
@@ -212,7 +211,6 @@
 @import "./views/elements/_ServerPicker.pcss";
 @import "./views/elements/_SettingsFlag.pcss";
 @import "./views/elements/_Spinner.pcss";
-@import "./views/elements/_StyledCheckbox.pcss";
 @import "./views/elements/_StyledRadioButton.pcss";
 @import "./views/elements/_SyntaxHighlight.pcss";
 @import "./views/elements/_TagComposer.pcss";