WallpaperPage has wrong default wallpaper

[Romain Reignier]

On first use, the "checked" wallpaper is Ipswich_is_THAT_way_by_simon.hedge instead of flatmesh.
https://github.com/AsteroidOS/asteroid-settings/blob/master/WallpaperPage.qml#L28

[Florent Revest]

Thanks for reporting, fixed by e3ff277