Quick Docs inline editor for some font properties cannot be opened (Quick Docs are out of date)

[julieyuan]

Steps:

1. Launch Brackets and open default sample project.
2. Open main.css file and put the cursor into a class.
3. Input the property font-kerning, then press Ctrl/Cmd + K to invoke Quick Docs.
4. Try these properties:
   font-variant-alternates,
   font-language-override,
   font-synthesis,
   font-variant-caps,
   font-variant-east-asian,
   font-variant-ligatures,
   font-variant-numeric,
   font-variant-position.

Result:
Quick Docs inline editor cannot be opened for these properties, but they can be found in Web platform docs.

Expected:
Quick Docs inline editor should be opened.

Notes:
This issue reproduces in Sprint30.

ENV: MAC 10.7 and Win7 English OS
Build: 0.34.0-10729

Snapshots:
Here are snapshots for details:

[marcelgerber]

font-kerning isn't even mentioned in css.json.
Seems like we should update this file (but I don't know how to).

[njx]

To @pthiess to figure out where we are with the updating of properties from Web Platform Docs. Marking low pri since these aren't common properties.

[pthiess]

@jadbox You may take a look at this and see whether there is an update - a while back we heard that the server side code will be updated to a new format so we put this work on hold.

[jadbox]

I'll check with that team is see if there's something we can do here.

[JeffryBooher]

I'll take this to follow up with Ethan

[marcelgerber]

@julieyuan Now that #9686 finally landed, I tested all the properties you mentioned.
Unfortunately, there're still no Quick Docs available for font-variant- caps/east-asian/ligatures/numeric/position, but that's just because there's no corresponding data on Web Platform Docs.
I still think this issue can be closed now.

[julieyuan]

Thanks @marcelgerber . Close this issue.