Space preferences for whether or not you see DMs in a Space (#7250)

src/stores/spaces/index.ts

@@ -53,3 +53,10 @@ export type SpaceKey = MetaSpace | Room["roomId"];
 export interface ISuggestedRoom extends IHierarchyRoom {
     viaServers: string[];
 }
+
+export function isMetaSpace(spaceKey: SpaceKey): boolean {
+    return spaceKey === MetaSpace.Home ||
+        spaceKey === MetaSpace.Favourites ||
+        spaceKey === MetaSpace.People ||
+        spaceKey === MetaSpace.Orphans;
+}