Include non-matching DMs in Spotlight recent conversations when the DM's userId is part of the search API results (#11374)

* This addresses two issues:

     1. Include non-matching DMs in Spotlight suggestions if the userId of the DM is included in the user directory search results
     2. The user directory search results order is kept when there is no relevant activity between users, instead of sorting by MXID

* Applying feedback from PR:
1. Updated comments
2. Renamed users to userDirectorySearchResults
3. Makes sure linter is happy

src/utils/SortMembers.ts

@@ -16,7 +16,6 @@ limitations under the License.
 
 import { groupBy, mapValues, maxBy, minBy, sumBy, takeRight } from "lodash";
 import { MatrixClient, Room, RoomMember } from "matrix-js-sdk/src/matrix";
-import { compare } from "matrix-js-sdk/src/utils";
 
 import { Member } from "./direct-messages";
 import DMRoomMap from "./DMRoomMap";
@@ -39,7 +38,9 @@ export const compareMembers =
 
         if (aScore === bScore) {
             if (aNumRooms === bNumRooms) {
-                return compare(a.userId, b.userId);
+                // If there is no activity between members,
+                // keep the order received from the user directory search results
+                return 0;
             }
 
             return bNumRooms - aNumRooms;