fix msg to be mc like

https://www.digminecraft.com/game_commands/enable_command_blocks.php

mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua

@@ -4,7 +4,7 @@ local F = minetest.formspec_escape
 local color_red = mcl_colors.RED
 
 local command_blocks_activated = minetest.settings:get_bool("mcl_enable_commandblocks", true)
-local msg_not_activated = S("Command Blocks are not activated on the server") --TODO: real mc message and translation
+local msg_not_activated = S("Command blocks are not enabled on this server") --TODO: translation
 
 local function construct(pos)
 	local meta = minetest.get_meta(pos)