Delete groups (legacy communities system) (#8027)

* Remove deprecated feature_communities_v2_prototypes

* Update _components

* i18n

* delint

* Cut out a bit more dead code

* Carve into legacy components

* Carve into mostly the room list code

* Carve into instances of "groupId"

* Carve out more of what comes up with "groups"

* Carve out some settings

* ignore related groups state

* Remove instances of spacesEnabled

* Fix some obvious issues

* Remove now-unused css

* Fix variable naming for legacy components

* Update i18n

* Misc cleanup from manual review

* Update snapshot for changed flag

* Appease linters

* rethemedex

* Remove now-unused AddressPickerDialog

* Make ConfirmUserActionDialog's member a required prop

* Remove useless override from RightPanelStore

* Remove extraneous CSS

* Update i18n

* Demo: "Communities are now Spaces" landing page

* Restore linkify for group IDs

* Demo: Dialog on click for communities->spaces notice

* i18n for demos

* i18n post-merge

* Update copy

* Appease the linter

* Post-merge cleanup

* Re-add spaces_learn_more_url to the new SdkConfig place

* Round 1 of post-merge fixes

* i18n

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

src/Analytics.tsx

@@ -27,6 +27,7 @@ import * as sdk from './index';
 import { SnakedObject } from "./utils/SnakedObject";
 import { IConfigOptions } from "./IConfigOptions";
 
+// Note: we keep the analytics redaction on groups in case people have old links.
 const hashRegex = /#\/(groups?|room|user|settings|register|login|forgot_password|home|directory)/;
 const hashVarRegex = /#\/(group|room|user)\/.*$/;
 
@@ -447,7 +448,7 @@ export class Analytics {
                 </table>
                 <div>
                     { _t('Where this page includes identifiable information, such as a room, '
-                        + 'user or group ID, that data is removed before being sent to the server.') }
+                        + 'user ID, that data is removed before being sent to the server.') }
                 </div>
             </div>,
         });