Emmet: guaranteed applying new preferences

[mrmlnc]

Source: #8457

I found a problem with cancelling settings.

Steps to Reproduce:

1. Open VS Code

2. Add to settings:

   "emmet.syntaxProfiles": {
     "html": {
       "attr_case": "upper"
     }
   }

3. Type .test and press tab to expand. Settings are applied. Result: <div CLASS="test"></div>

4. Delete added settings.

5. Type .test and press tab to expand, the setting doesn't apply. Result: <div CLASS="test"></div>

Why is it so simple?

The method loadPreferences only works with the documented values. Undocumented value not supported. An example of undocumented value: less.propertyEnd — these values are hidden in Emmet. Because it is not needed for users.

Why deleted condition to apply syntax profiles?

Here it is superfluous. Just got the keys and nothing more if the editor has no settings:

loadProfiles: function(profiles) {
    profiles = utils.parseJSON(profiles);
    Object.keys(profiles).forEach(function(name) {
        profile.create(name, normalizeProfile(profiles[name]));
    });
}

[mention-bot]

By analyzing the blame information on this pull request, we identified @egamma and @alexandrudima to be potential reviewers

[msftclas]

Hi @mrmlnc, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!
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[mrmlnc]

Ooops, 🔮

[msftclas]

Hi @mrmlnc, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!
You've already signed the contribution license agreement. Thanks!

The agreement was validated by Microsoft and real humans are currently evaluating your PR.

TTYL, MSBOT;