first commit

Nitrox.Launcher/Models/Controls/SelectableRichTextBlock.cs

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+using System;
+using Avalonia;
+using Avalonia.Controls;
+
+namespace Nitrox.Launcher.Models.Controls;
+
+/// <inheritdoc cref="RichTextBlock"/>
+public class SelectableRichTextBlock : SelectableTextBlock
+{
+    protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+    {
+        base.OnPropertyChanged(change);
+
+        if (change.Property == TextProperty)
+        {
+            Inlines?.Clear();
+            RichTextBlock.ParseTextAndAddInlines(Text ?? "", Inlines);
+            // If all text was just tags, set Text to empty. Otherwise, it will be displayed as fallback by Avalonia.
+            if (Inlines?.Count < 1)
+            {
+                Text = "";
+            }
+        }
+    }
+
+    protected override Type StyleKeyOverride { get; } = typeof(SelectableTextBlock);
+}