Add extended tooltips

mods/ITEMS/mcl_mobspawners/init.lua

@@ -266,6 +266,7 @@ minetest.register_node("mcl_mobspawners:spawner", {
 	paramtype = "light",
 	walkable = true,
 	description = S("Mob Spawner"),
+	_tt_help = S("Makes mobs appear"),
 	_doc_items_longdesc = S("A mob spawner regularily causes mobs to appear around it while a player is nearby. Some mob spawners are disabled while in light."),
 	_doc_items_usagehelp = S("If you have a spawn egg, you can use it to change the mob to spawn. Just place the item on the mob spawner. Player-set mob spawners always spawn mobs regardless of the light level."),
 	groups = {pickaxey=1, material_stone=1, deco_block=1},