UI layout optimization

[gardenevery]

Optimize the "Create New World" screen.
Add World Options in the position previously occupied by the Difficulty option.

[Rongmario]

Which mods would conflict or not be needed anymore with this change?

[gardenevery]

Tested two modpacks: GTQT 1.8.7 and E2E-E 1.74.1

Conflicting mods:
Default World Generator (port)

Mods similar to the conflicting mod:
Default World Generator without Server Side Prompts

Mod causes issues with the "Create New World" screen reverting to the legacy UI (standalone mod) / causing UI layout issues (GTQT modpack)
com.ezrol.terry.minecraft.defaultworldgenerator.events.GuiEvents
com.ezrol.terry.minecraft.defaultworldgenerator.gui.GuiCreateCustomWorld
There are no mods that are no longer needed.

[Desoroxxx]

So, here are my thoughts, first, any UI change like this should be a config option, as mods do modify these screens and will break.
I know from memory that there are a decent number of mods that would conflict that were not mentioned here.

Second of all, this needs a bit more refining, in my opinion, for example, "World Name" should go in the "World" tab instead of the "Game" tab.

Lastly, a gamerule menu should be dynamic (mods can add gamerules), and be available before world creation too, I think backporting such a menu would be great from newer versions (they put categories on gamerules too, which is nice)