Fix clicking the beatmap import notification at the daily challenge screen exiting to main menu

[peppy]

Addresses #29303.

This also fixes an issue with presentation that I found while testing (the present would fail if you just deleted the beatmap you're testing re-import with). I attempted to write a test for this but give up after 20 minutes of trying. Getting the deletion in the same state is hard. Test diff below if anyone wants to give it further time:

diff --git a/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs b/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
index c054792168..2570488425 100644
--- a/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
+++ b/osu.Game.Tests/Visual/Navigation/TestScenePresentBeatmap.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
 using System.Linq;
 using NUnit.Framework;
@@ -37,6 +35,22 @@ public void TestFromMainMenu()
             presentSecondDifficultyAndConfirm(secondImport, 3);
         }
 
+        [Test]
+        public void TestFromMainMenuWithDelete()
+        {
+            var firstImport = importBeatmap(1);
+            var secondImport = importBeatmap(3);
+
+            presentAndConfirm(firstImport);
+            returnToMenu();
+            presentAndConfirm(secondImport);
+            returnToMenu();
+
+            AddStep("delete first", () => Game.BeatmapManager.Delete(firstImport()));
+            var firstImportAgain = importBeatmap(1);
+            presentAndConfirm(firstImportAgain);
+        }
+
         [Test]
         public void TestFromMainMenuDifferentRuleset()
         {
@@ -133,9 +147,9 @@ private void returnToMenu()
             AddUntilStep("wait for menu", () => Game.ScreenStack.CurrentScreen is MainMenu);
         }
 
-        private Func<BeatmapSetInfo> importBeatmap(int i, RulesetInfo ruleset = null)
+        private Func<BeatmapSetInfo> importBeatmap(int i, RulesetInfo? ruleset = null)
         {
-            BeatmapSetInfo imported = null;
+            BeatmapSetInfo? imported = null;
             AddStep($"import beatmap {i}", () =>
             {
                 var metadata = new BeatmapMetadata
@@ -171,7 +185,7 @@ private Func<BeatmapSetInfo> importBeatmap(int i, RulesetInfo ruleset = null)
 
             AddAssert($"import {i} succeeded", () => imported != null);
 
-            return () => imported;
+            return () => imported!;
         }
 
         private void confirmBeatmapInSongSelect(Func<BeatmapSetInfo> getImport)

[peppy]

@smoogipoo sorry, once more..

[smoogipoo]

This is infinitely looping, creating millions of PerformFromMenuRunner classes and whatnot other garbage.

[peppy]

I made a very big oversight while testing 😅. Pushed a fix.