Hide the action button label if it's empty. (#11902)

Reduces visual clutter just slightly, by avoiding bright white text in an otherwise empty and dark space.

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>

Content.Client/UserInterface/Systems/Actions/Controls/ActionButton.cs

@@ -294,6 +294,7 @@ public sealed class ActionButton : Control
     public void UpdateData(ActionType action)
     {
         Action = action;
+        Label.Visible = true;
         UpdateIcons();
     }
 
@@ -302,6 +303,7 @@ public sealed class ActionButton : Control
         Action = null;
         Cooldown.Visible = false;
         Cooldown.Progress = 1;
+        Label.Visible = false;
         UpdateIcons();
     }