Revert -webkit-font-smoothing to auto

[hcarvalhoalves]

This forces proper subpixel antialiasing which looks way better on Mac. Makes no difference on other platforms.

Jagged lines with -webkit-font-smoothing: antialised:

Proper antialiasing with -webkit-font-smoothing: auto:

[redmunds]

@hcarvalhoalves According to the comment (that you removed), this was done to fix animations -- did you test how animations work with this change? We won't take this fix into core if animations are still broken.

It might be more reasonable to make this a Theme option.

cc @larz0

[hcarvalhoalves]

@redmunds I removed exactly because I could not find any difference in animations, it just affected font rendering on OS X. Might want to test on other platforms though, to see if the selector should be body.platform-mac.

[larz0]

This font smoothing issue has been talked about a lot, @manchagnu even added the option to the theme dialog but I can't remember what happened.

[larz0]

By @manchagnu I meant @MiguelCastillo

[larz0]

See #8635.

[MiguelCastillo]

@larz0 yeah we had added it even as an option in the themes dialog, which is the place we have fonts settings. We decided we should just handle that internally and not provided as a setting. We thinking we need to rethink that decision?

[hcarvalhoalves]

I saw #8635. Most editors have an option to change antialiasing methods (Textmate, Sublime Text), so it makes sense I guess.

But in the meantime, -webkit-font-smoothing: aliased triggers a different method than the default used everywhere on OS X's UI, so should be avoided for consistency sake.

[MiguelCastillo]

@hcarvalhoalves yeah that's the PR I added the setting.

[MiguelCastillo]

So the initial issue was this #8630. It seems like exposing this via the UI is not what we want to do because it's probably a setting that few people will use.

What about adding this as a configuration flag and document it here https://github.com/adobe/brackets/wiki/How-to-Use-Brackets#preferences?