Avalonia - Use content dialog for user profile manager (#3455)

* remove content dialog placeholder from all windows

* remove redundant window argument

* redesign user profile window

* wip

* use avalonia auto name generator

* add edit and new user options

* move profile image selection to content dialog

* remove usings

* fix updater

* address review

* adjust avatar dialog size

* add validation for user editor

* fix typo

* Shorten some labels

Ryujinx.Ava/Ui/Windows/AboutWindow.axaml.cs

@@ -13,7 +13,7 @@ using System.Threading.Tasks;
 
 namespace Ryujinx.Ava.Ui.Windows
 {
-    public class AboutWindow : StyleableWindow
+    public partial class AboutWindow : StyleableWindow
     {
         public AboutWindow()
         {
@@ -39,15 +39,6 @@ namespace Ryujinx.Ava.Ui.Windows
 
         public string Developers => string.Format(LocaleManager.Instance["AboutPageDeveloperListMore"], "gdkchan, Ac_K, Thog, rip in peri peri, LDj3SNuD, emmaus, Thealexbarney, Xpl0itR, GoffyDude, »jD«");
 
-        public TextBlock SupportersTextBlock { get; set; }
-
-        private void InitializeComponent()
-        {
-            AvaloniaXamlLoader.Load(this);
-
-            SupportersTextBlock = this.FindControl<TextBlock>("SupportersTextBlock");
-        }
-
         private void Button_OnClick(object sender, RoutedEventArgs e)
         {
             if (sender is Button button)