FocalPointPicker renders unlabelled input fields

[afercia]

See #10925 (comment)

The FocalPointPicker component renders two input fields that are completely unlabelled:

The visible text is just plain text. There's no associated <label> element or aria-label attribute to give these two controls a proper label. I'm going to create an issue.

As this is not the first case unlabelled UI controls are merged in Gutenberg, I'd greatly appreciate some discussion to find a way to avoid this kind of oversights. Better code reviews or automated testing may help. Thank you.

[afercia]

At this point, I'm pretty sure there are other unlabelled UI controls in Gutenberg, as some components e.g. the BaseControl allow to just ignore a proper labelling.

[afercia]

See #9802 (comment) for a general approach to avoid cases like this one.

[aduth]

Fixed in #14152

#6989 should sufficiently track the future avoidance, currently proposed for improvement at #14151.