Is your feature request related to a problem? Please describe.
It's annoying having to click Main Settings every time you open the settings menu.

Describe the solution you'd like
The options should be shown by default.

Additional context
I'll likely just need to remove the nested MainSettings class -- but I'm new to Cloth Config so we shall see.

Commit 4abb974 satisfies this issue:

It doesn't remove the main settings category, but the main issue was having it start collapsed.

Closing.