menu.conf: add OSC layout selection

Make this feature discoverable.

Author: guidocella

etc/menu.conf

@@ -124,6 +124,14 @@ V&iew
 	&Key bindings			script-binding stats/display-page-4-toggle
 	&Time OSD				no-osd cycle-values osd-level 3 1	checked=osd_level == 3
 	&Cycle OSC visibility	script-binding osc/visibility
+	&OSC layout
+		&Bottom bar			no-osd change-list script-opts append osc-layout=bottombar
+		&Top bar			no-osd change-list script-opts append osc-layout=topbar
+		&Floating			no-osd change-list script-opts append osc-layout=floating
+		B&ox				no-osd change-list script-opts append osc-layout=box
+		&Slimbox			no-osd change-list script-opts append osc-layout=slimbox
+		S&lim bottom bar	no-osd change-list script-opts append osc-layout=slimbottombar	hidden=not p["current-tracks/video/image"] or p["current-tracks/audio"]
+		Sl&im top bar		no-osd change-list script-opts append osc-layout=slimtopbar		hidden=not p["current-tracks/video/image"] or p["current-tracks/audio"]
 P&rofiles	$profiles
 T&ools
 	Copy &path		set clipboard/text ${path}			disabled=idle_active