Fix monochrome icon, add warning when it's not specified

[Summersay415]

Fix small typo which resulted in setting adaptive background icon to monochrome one if monochrome is specified.

[m4gr3d]

Thanks for the fix!

[syntaxerror247]

Thanks, I’m not sure how I missed it! 😅

[syntaxerror247]

@Summersay415 Can you add a warning in Export Present if monochrome icon is not provided.
Eg. No monochrome icon provided; default Godot monochrome icon will be used.

[Summersay415]

@Summersay415 Can you add a warning in Export Present if monochrome icon is not provided.
Eg. No monochrome icon provided; default Godot monochrome icon will be used.

Should I do this with adaptive background too?

[syntaxerror247]

I don't think that's needed, default adaptive background is just a plane color.

But in case of monochrome icon, I think it would be better to add this warning. It is a new feature, so it can be overlooked during export and it is not just a plane color insted Godot monochrome logo.

I have added this warning in documentation, but most of the users don't read docs.

CC @m4gr3d

[Summersay415]

I should this warning in export window or just print in console?

[syntaxerror247]

In export window, like we have for invalid pakage name.

[Summersay415]

like this?

[m4gr3d]

Looks good!

[Repiteo]

Thanks!

[syntaxerror247]

No need to backport this to 4.3; it has already been addressed in #100066