[css-inline-3] Extend “applies to” for SVG text

[AmeliaBR]

Closes #3411
See issue for discussion/reasoning & differences from SVG 1.

Bikeshed error that needs fixing:
the “current text position” definition from SVG text
is not being exported in a way that Bikeshed is picking up,
even with hints about which spec to look for it in.
(@tabatkins, can I fix this here, or do I need to add some attributes to the SVG spec?)

Changes should be copied over to css-inline-4 after review.

[tabatkins]

"current text position" is definitely present in the db and linkable, but it's not exported, so you'll need to specify the spec to override that and link it anyway.

You can either do that inline <l spec=svg2>[=current text position=]</l> or by putting it in <pre class=link-defaults>.

[AmeliaBR]

or by putting it in <pre class=link-defaults>

I had tried that, but I hadn't used the correct shortname for the SVG2 spec. Fixed now.

@fantasai, ready to merge if you're OK with how I handled the properties with inconsistent implementations. Note that this is only the edits to CSS Inline 3, you'll want to port to Inline 4

[AmeliaBR]

@fantasai, ready to merge if you're OK

Actually, NOW it's ready to merge, after I pulled in your latest edits & fixed the merge conflicts…

You probably want to review carefully.

[fantasai]

Sorry, thanks! ^_^