fix: "pick and restart" option in branch switcher not saving in time

Dalamud/Configuration/Internal/DalamudConfiguration.cs

@@ -370,13 +370,21 @@ internal sealed class DalamudConfiguration : IServiceType
     }
 
     /// <summary>
-    /// Save the configuration at the path it was loaded from.
+    /// Save the configuration at the path it was loaded from, at the next frame.
     /// </summary>
     public void QueueSave()
     {
         this.isSaveQueued = true;
     }
 
+    /// <summary>
+    /// Immediately save the configuration.
+    /// </summary>
+    public void ForceSave()
+    {
+        this.Save();
+    }
+
     /// <summary>
     /// Save the file, if needed. Only needs to be done once a frame.
     /// </summary>

Dalamud/Interface/Internal/Windows/BranchSwitcherWindow.cs

@@ -103,6 +103,9 @@ public class BranchSwitcherWindow : Window
             {
                 Pick();
 
+                // If we exit immediately, we need to write out the new config now
+                Service<DalamudConfiguration>.Get().ForceSave();
+
                 var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                 var xlPath = Path.Combine(appData, "XIVLauncher", "XIVLauncher.exe");