Bug 1048845 - [Messages] Compose Panel refresh (subject behavior change). r=schung

This rule looks a bit weird because every property is in a separate group - I'm just experimenting with more strict css property grouping and sorting. I took https://github.com/csscomb/csscomb.js/blob/master/config/yandex.json as basis because here defined groups/order for almost every CSS property, it's easier (at least for me) when I have such predefined and clear list of groups and order inside this group :) But maybe it's too verbos,  so please share what do you think about it!