misc: Move the rest of Ryujinx.UI.Common into other parts of the project.

src/Ryujinx/UI/Helpers/MultiplayerInfoConverter.cs

@@ -2,7 +2,6 @@ using Avalonia.Data.Converters;
 using Avalonia.Markup.Xaml;
 using Ryujinx.Ava.Common.Locale;
 using Ryujinx.Ava.Utilities.AppLibrary;
-using Ryujinx.UI.Common.Helper;
 using System;
 using System.Globalization;
 

src/Ryujinx/UI/Helpers/UserErrorDialog.cs

@@ -1,6 +1,5 @@
 using Ryujinx.Ava.Common.Locale;
 using Ryujinx.Common.UI;
-using Ryujinx.UI.Common;
 using System.Threading.Tasks;
 
 namespace Ryujinx.Ava.UI.Helpers