Indent rainbow is not updated after detecting indentation from content

[Tyriar]

1. Open a file with a different style of indentation (error color is visible)
2. Run detect indentation from content command (notice error bars don't disappear even though things are valid)

Editing the file makes the changes take effect.

[oderwat]

Could be possible to add one more hook to try to fix that. I may try that eventually.