add_editor_style() doesn't work with stylesheets with commas in URL

[danielbachhuber]

add_editor_style( 'https://fonts.googleapis.com/css?family=Roboto+Condensed:700,400,300|Roboto:300,400,700|Roboto+Slab:300,700' );

Because mce_css comma-separates the stylesheets. It looks like this came up in #24653, but not clear how it was addressed.

[danielbachhuber]

Encoding the commas works :)

add_editor_style( 'https://fonts.googleapis.com/css?family=Roboto+Condensed:700%2C400%2C300|Roboto:300%2C400%2C700|Roboto+Slab:300%2C700' );