Add message letting users know that beatmaps are donwloading in the background

osu.Game/Localisation/FirstRunSetupBeatmapScreenStrings.cs

@@ -39,6 +39,11 @@ public static class FirstRunSetupBeatmapScreenStrings
         /// </summary>
         public static LocalisableString BundledButton => new TranslatableString(getKey(@"bundled_button"), @"Get recommended beatmaps");
 
+        /// <summary>
+        /// "Beatmaps will be downloaded in the background. You can continue with setup while this happens!"
+        /// </summary>
+        public static LocalisableString DownloadingInBackground => new TranslatableString(getKey(@"downloading_in_background"), @"Beatmaps will be downloaded in the background. You can continue with setup while this happens!");
+
         /// <summary>
         /// "You can also obtain more beatmaps from the main menu &quot;browse&quot; button at any time."
         /// </summary>

osu.Game/Overlays/FirstRunSetup/ScreenBeatmaps.cs

@@ -15,6 +15,7 @@
 using osu.Game.Localisation;
 using osu.Game.Online;
 using osuTK;
+using osuTK.Graphics;
 using Realms;
 
 namespace osu.Game.Overlays.FirstRunSetup
@@ -25,6 +26,8 @@ public partial class ScreenBeatmaps : FirstRunSetupScreen
         private ProgressRoundedButton downloadBundledButton = null!;
         private ProgressRoundedButton downloadTutorialButton = null!;
 
+        private OsuTextFlowContainer downloadInBackgroundText = null!;
+
         private OsuTextFlowContainer currentlyLoadedBeatmaps = null!;
 
         private BundledBeatmapDownloader? tutorialDownloader;
@@ -100,6 +103,15 @@ private void load()
                     Text = FirstRunSetupBeatmapScreenStrings.BundledButton,
                     Action = downloadBundled
                 },
+                downloadInBackgroundText = new OsuTextFlowContainer(cp => cp.Font = OsuFont.Default.With(size: CONTENT_FONT_SIZE))
+                {
+                    Colour = OverlayColourProvider.Light2,
+                    Alpha = 0,
+                    TextAnchor = Anchor.TopCentre,
+                    Text = FirstRunSetupBeatmapScreenStrings.DownloadingInBackground,
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y
+                },
                 new OsuTextFlowContainer(cp => cp.Font = OsuFont.Default.With(size: CONTENT_FONT_SIZE))
                 {
                     Colour = OverlayColourProvider.Content1,
@@ -169,6 +181,10 @@ private void downloadBundled()
             if (bundledDownloader != null)
                 return;
 
+            downloadInBackgroundText
+                .FlashColour(Color4.White, 500)
+                .FadeIn(200);
+
             bundledDownloader = new BundledBeatmapDownloader(false);
 
             AddInternal(bundledDownloader);