Overhaul custom inspector generation

[Banane9]

Make sure to update your MonkeyLoader install from master too if you want to test this.

• Adds the AllowContainer argument to the custom inspector events
• Places all of header generation into the event
  • Default generation is handled by the default handler
  • The positioning uses ConfigKeySessionShare components to make it appear customized (or default) for everyone
  • Places the open container button to the left by default

[Nytra]

Seems good, however if the shared config gets destroyed it doesn't seem to recover correctly. It does not create the user overrides or the dynamic fields.

[Banane9]

Hmmm, I thought I made it so that it always checks that when creating new drives. Checking for that in every place it's used would seem like overkill.

Feel free to look into it or make an issue with more details 👀