Set is_ground_content=false for some nodes

mods/ITEMS/REDSTONE/mesecons_pressureplates/init.lua

@@ -110,7 +110,7 @@ function mesecon.register_pressure_plate(basename, description, textures_off, te
 			minetest.get_node_timer(pos):start(PRESSURE_PLATE_INTERVAL)
 		end,
 		sounds = sounds,
-
+		is_ground_content = false,
 		pressureplate_basename = basename,
 		pressureplate_activated_by = activated_by,
 		_mcl_blast_resistance = 2.5,

mods/ITEMS/REDSTONE/mesecons_wires/init.lua

@@ -249,6 +249,7 @@ Read the help entries on the other redstone components to learn how redstone com
 			walkable = false,
 			drop = "mesecons:wire_00000000_off",
 			sounds = mcl_sounds.node_sound_defaults(),
+			is_ground_content = false,
 			mesecon_wire = true
 		},{
 			_doc_items_create_entry = wirehelp,