Fix Watches and Add Ashtrays Examine Hint (#22219)

fixes watches referring to bluespace during the roundend timer, ashtrays
not having a examine hint about emptying vs putting it into a disposal,
and ashtrays not giving a feedback message when trying to empty a empty
one.

fixes #22209 and fixes #22215.

code/game/objects/items/weapons/material/ashtray.dm

@@ -134,6 +134,10 @@
 		update_icon()
 	return ..()
 
+/obj/item/material/ashtray/mechanics_hints(mob/user, distance, is_adjacent)
+	. += ..()
+	. += "Use help intent to empty into a disposal. Use harm intent to put into a disposal."
+
 /obj/item/material/ashtray/plastic/Initialize(newloc, material_key)
 	. = ..(newloc, MATERIAL_PLASTIC)