[BUGFIX] Font Awesome override fixed
[BUGFIX] Font Awesome override fixed

Only font-family should be overridden. Otherwise our own custom CSS
overrides FA styles loaded before. For example, all .fa-2x, .fa-3x etc
would not set font-size properly.

See change 9a5a90175a9fd87df0c052ae14104bc59f29719b

million12/M12.FoundationSite,million12/M12.FoundationSite