Add variables to style label before/after pseudo-elements

[ydubinskyi]

Description

Want to have possibility to style label after/before pseudo-elements. (ex. It's a great way to add required asterisk.)

Expected outcome

Have possibility to style label after/before pseudo-elements.

Actual outcome

There is no way to style those pseudo-elements.

Browsers Affected

• [x] Chrome
• [x] Firefox
• [x] Safari 9
• [x] Safari 8
• [x] Safari 7
• [x] Edge
• [x] IE 11
• [x] IE 10