add back center pivot to object selection mode

Author: aylaylay

game/addons/tools/Code/Scene/Mesh/Tools/ObjectSelection.UI.cs

@@ -84,6 +84,7 @@ public ObjectSelectionWidget( SerializedObject so, ObjectSelection tool ) : base
 				CreateButton( "Previous", "chevron_left", "mesh.previous-pivot", PreviousPivot, _gos.Length > 0, grid );
 				CreateButton( "Next", "chevron_right", "mesh.next-pivot", NextPivot, _gos.Length > 0, grid );
 				CreateButton( "Clear", "restart_alt", "mesh.clear-pivot", ClearPivot, _gos.Length > 0, grid );
+				CreateButton( "Center", "center_focus_strong", "mesh.center-pivot", CenterPivot, _gos.Length > 0, grid );
 				CreateButton( "World Origin", "language", "mesh.zero-pivot", ZeroPivot, _gos.Length > 0, grid );
 
 				grid.AddStretchCell();
@@ -130,6 +131,9 @@ void OpenClippingTool()
 		[Shortcut( "mesh.next-pivot", "N+MWheelUp", typeof( SceneViewWidget ) )]
 		public void NextPivot() => _tool.NextPivot();
 
+		[Shortcut( "mesh.center-pivot", "Ctrl+Home", typeof( SceneViewWidget ) )]
+		public void CenterPivot() => _tool.CenterPivot();
+
 		[Shortcut( "mesh.clear-pivot", "Home", typeof( SceneViewWidget ) )]
 		public void ClearPivot() => _tool.ClearPivot();