mainmenu dlg_config_world.lua can not show enabled unified_inventory mod

[snowyu]

Minetest version

Minetest 5.5.0-3b842a7e0 (Linux)
Using Irrlicht 1.9.0mt3
Using LuaJIT 2.1.0-beta3
BUILD_TYPE=Release
RUN_IN_PLACE=1
USE_CURL=1
USE_GETTEXT=1
USE_SOUND=1
USE_FREETYPE=1
STATIC_SHAREDIR="."
STATIC_LOCALEDIR="locale"

Summary

Set the load_mod_unified_inventory = true in the world.mt.
But it is not enabled in the dlg_config_world.

Steps to reproduce

1. Put the unified_inventory mod into mods directory

2. Put the techage_modepack modpack into mods directory too.

3. Set the load_mod_unified_inventory = true in the world.mt.

   load_mod_unified_inventory = true

run the minetest , switch to local game tab, click the mod config of the world.
You will see the unified_inventory mod is not enabled.

I found the reason is the techage_modepack has the unified_inventory mod too and not enabled(nil).