New benches, colourable sofas (#17985)

* new benches, colourable sofas, directional beds

* removes bench corners

* slight sprite tweak

* inverse corners!

* removes rotatable beds due to mob jank and bedsheets

* fixes that one freaking always wrong cyberiad sofa

* make things use the in-built spraycan menu

code/datums/mutable_appearance.dm

@@ -10,7 +10,7 @@
 						// And yes this does have to be in the constructor, BYOND ignores it if you set it as a normal var
 
 // Helper similar to image()
-/proc/mutable_appearance(icon, icon_state = "", layer = FLOAT_LAYER, plane = FLOAT_PLANE, alpha = 255, appearance_flags = NONE)
+/proc/mutable_appearance(icon, icon_state = "", layer = FLOAT_LAYER, plane = FLOAT_PLANE, alpha = 255, appearance_flags = NONE, color)
 	var/mutable_appearance/MA = new()
 	MA.icon = icon
 	MA.icon_state = icon_state
@@ -18,6 +18,8 @@
 	MA.plane = plane
 	MA.alpha = alpha
 	MA.appearance_flags |= appearance_flags
+	if(color)
+		MA.color = color
 	return MA
 
 /mutable_appearance/clean/New()