moreblocks: update wool groups to match the original wool node

moreblocks.lua

@@ -63,7 +63,8 @@ for i = 1, 16 do
     stairsplus:register_all("moreblocks", "wool_"..name, "wool:"..name, {
         description = name.." Wool",
         tiles = {"wool_"..name..".png"},
-        groups = {oddly_breakabe_by_hand=1},
+        groups = {snappy = 2, choppy = 2, oddly_breakable_by_hand = 3,
+                flammable = 3, wool = 1},
         sounds = illuna.node_sound_wool(),
     })
     minetest.register_alias(name..":slab_block_1", "moreblocks:slab_wool_"..name.."_1")