Add group for loadouts (#36951)

Co-authored-by: ArtisticRoomba <145879011+ArtisticRoomba@users.noreply.github.com>

Content.Client/Lobby/UI/Loadouts/ToggleLoadoutButton.xaml.cs

@@ -0,0 +1,10 @@
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+
+namespace Content.Client.Lobby.UI.Loadouts;
+
+/// <summary>
+/// A button that toggles the loadout groups. Needs for override default styles.
+/// </summary>
+[GenerateTypedNameReferences]
+public sealed partial class ToggleLoadoutButton : Button;