Juicy icon update for mangosd

* Unique tinted icons for each version to distinguish one running mangosd from another
* Added huge 256x256 Vista+ icons
* Removed unused icon variants
* As a result, file size of an icon was reduced slightly

(based on cmangos/mangos-wotlk@fb455770f)

Signed-off-by: Xfurry <xfurry.cmangos@outlook.com>