Propose Windows camouflage for different Windows versions

Originally created by @madmars on #7720 (Redmine)

Since the Windows 8 camouflage just looks ugly and false, there might should be a theme choice for additional XP in the login options, although it’s out of support in real.
XP looked great on former Tails versions - and at least choosing it would let you look like a noob in the public and - not like a Tails pro ;-)

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