Add setting auto_fix_orientation to enable auto image rotation

[wladif]

Currently, imported images are automatically rotated even when the editor_enabled is disabled, the automatic rotation takes place as part of the image normalization process.
This feels a bit unintuitive and this PR fixes it by taking into account this setting when normalizing the image.

[ildyria]

No, that setting is to allow the manual rotations buttons in the header.
It is completely unrelated to automatic rotation on upload.

A better approach would be to create an auto_fix_orientation setting (defaulted to 1) in the Image Processing category and use it instead.

You can use php artisan make:migration add_auto_fix_orientation_setting to create a stub for the database migration.

[codecov]

Codecov Report

Merging #1766 (cb83a38) into master (c138459) will decrease coverage by 0.48%.
The diff coverage is 100.00%.

Additional details and impacted files

[wladif]

I've avoided adding another setting because to me it made more sense that if I, as a user, can't edit the image the system should not be allowed to do it either, this will not be the case with an extra setting (not without extra logic anyway).
I'll update the PR to add the extra setting. Thanks!

[ildyria]

@wladif I fixed the formatting issue (make formatting) could you confirm this is ready for review ? :)

[ildyria]

LGTM.

[wladif]

@ildyria Thanks for fixing the formatting. Yes, it's ready for review.