Add CSS Text Decoration 4

[SebastianZ]

Mozilla started to implement various features defined in the CSS Text Decoration Module Level 4 specification.

Those features include the CSS properties text-decoration-skip-ink, text-decoration-thickness, and text-underline-offset.
Two of the properties defined in the spec. are not yet implemented. Those are text-decoration-skip and text-emphasis-skip. Both have pending issues in the spec., the latter may even be removed again, so it's unlikely they get implemented soon.

So, either the specification as a whole or the different supported properties individually should be added to the platform status info. What's better?

Sebastian

[chrisdavidmills]

Generally we tend to granulate the features on this site by "major features of interest", rather than by individual proerties, interfaces, etc.

I wouldn't say any one of these properties is interesting enough on its own to be considered a major feature, but the whole spec together might.

Maybe wait until the spec stabilizes a bit, and then add an entry that initially says it refers to partial support of the module, i.e. properties x, y, and z (or whatever)?

[chrisdavidmills]

Now much of this is available by default in Fx 70, I've added it:

#594

Thoughts?