c62c23ba_nar_shortcuts_pane__Xfce_Wiki___Description
[ID] B23 [Mockup custom-view] – [Thunar] Yes [Description] 
If a new mount or volume becomes available and the corresponding category is collapsed, its header flashes a few times (e.g. by changing the background color)
design:thunar:shortcuts-pane [Xfce Wiki]
Description