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/utils/permalinks/ElementPermalinkConstructor.ts

@@ -80,8 +80,8 @@ export default class ElementPermalinkConstructor extends PermalinkConstructor {
     }
 
     /**
-     * Parses an app route (`(user|room|group)/identifer`) to a Matrix entity
-     * (room, user, group).
+     * Parses an app route (`(user|room)/identifer`) to a Matrix entity
+     * (room, user).
      * @param {string} route The app route
      * @returns {PermalinkParts}
      */
@@ -102,14 +102,13 @@ export default class ElementPermalinkConstructor extends PermalinkConstructor {
         if (entityType === 'user') {
             // Probably a user, no further parsing needed.
             return PermalinkParts.forUser(entity);
-        } else if (entityType === 'group') {
-            // Probably a group, no further parsing needed.
-            return PermalinkParts.forGroup(entity);
         } else if (entityType === 'room') {
             // Rejoin the rest because v3 events can have slashes (annoyingly)
             const eventId = parts.length > 2 ? parts.slice(2).join('/') : "";
             const via = query.split(/&?via=/).filter(p => !!p);
             return PermalinkParts.forEvent(entity, eventId, via);
+        } else if (entityType === 'group') {
+            return PermalinkParts.forGroup(entity);
         } else {
             throw new Error("Unknown entity type in permalink");
         }