Bind the mod select overlay's Beatmap to OsuScreen.Beatmap in constru…

…ctor

Suggested by @bdach!

osu.Game/Screens/OnlinePlay/DailyChallenge/DailyChallenge.cs

@@ -301,6 +301,7 @@ [new MatchChatDisplay(room) { RelativeSizeAxes = Axes.Both }]
 
             LoadComponent(userModsSelectOverlay = new RoomModSelectOverlay
             {
+                Beatmap = { BindTarget = Beatmap },
                 SelectedMods = { BindTarget = userMods },
                 IsValidMod = _ => false
             });
@@ -380,8 +381,6 @@ private void trySetDailyChallengeBeatmap()
             Beatmap.Value = beatmapManager.GetWorkingBeatmap(beatmap); // this will gracefully fall back to dummy beatmap if missing locally.
             Ruleset.Value = rulesets.GetRuleset(playlistItem.RulesetID);
 
-            userModsSelectOverlay.Beatmap.Value = Beatmap.Value;
-
             applyLoopingToTrack();
         }