Add world conversion warning screen

[SuperSoupr]

Adds 2 warnings
for when world conversion is about to happen
and for when exu isn't loaded but also world conversion is disabled

[SuperSoupr]

Activation logic for this needs to be discussed, not sure what was decided in the end
Are we having a warning all the time or just when not in nh?

[FourIsTheNumber]

Activation logic for this needs to be discussed, not sure what was decided in the end Are we having a warning all the time or just when not in nh?

Probably best to ask admins or poll in dev votes

[boubou19]

If we look into what NH does already, you'll see that we only expose a warning when there are unhandled missing mapping events fired. FPLib added another message when the id extenders have changed, copying the fml missing mapping screen. But if your goal is to do a seamless transition on NH, the screen should not be visible imo.

Also, no matter what you end up chosing, i suggest to make it so that screen behaves the same as regular forge screen, so server admins can control it with -Dfml.doNotBackup and -Dfml.queryResult flags.

[FourIsTheNumber]

I think disabling it in nh is likely fine, but we can config it on by default.

[SuperSoupr]

Yeah, I agree with disabling it in nh but keeping the default on

i suggest to make it so that screen behaves the same as regular forge screen, so server admins can control it with -Dfml.doNotBackup and -Dfml.queryResult flags.

It piggybacks off of the fml query system so those flags will already work for it too :)