With the media queries we don't need anymore the calendar-windows assign to distinguish between XP and aero.
Created attachment 8616781 [details] [diff] [review]
This removes all usages of win-classic and win-aero. Instead of this it is using media queries.
This patch needs Bug 1153615 applied first which cleans already a lot.
Pushed to comm-central changeset 7769a3035556