misc: chore: Strip extension in GetNameForApplicationId instead of requiring the caller to do it

src/Ryujinx/UI/Models/ModModel.cs

@@ -14,7 +14,7 @@ namespace Ryujinx.Ava.UI.Models
 
         public string FormattedName => 
             InSd && ulong.TryParse(Name, NumberStyles.HexNumber, null, out ulong applicationId)
-                ? $"Atmosphère: {System.IO.Path.GetFileNameWithoutExtension(RyujinxApp.MainWindow.ApplicationLibrary.GetNameForApplicationId(applicationId))}"
+                ? $"Atmosphère: {RyujinxApp.MainWindow.ApplicationLibrary.GetNameForApplicationId(applicationId)}"
                 : Name;
 
         public ModModel(string path, string name, bool enabled, bool inSd)

src/Ryujinx/Utilities/AppLibrary/ApplicationLibrary.cs

@@ -130,7 +130,7 @@ namespace Ryujinx.Ava.Utilities.AppLibrary
                 return appData.Value.Name;
             
             if (DownloadableContents.Keys.FindFirst(x => x.TitleId == id).TryGet(out DownloadableContentModel dlcData))
-                return dlcData.FileName;
+                return Path.GetFileNameWithoutExtension(dlcData.FileName);
 
             return id.ToString("X16");
         }