New header-background for new year

[chris34]

With the the new color, the old header-backgrounds do not fit very well.

[KaiserBarbarossa]

Isn’t that closed?

[chris34]

IMO this is half way done. Xmas was adressed by #407, yes.

However, for new year a special background is not created yet. I dont know if @v-gar has ideas or already a prototype.

[KaiserBarbarossa]

Allright, thanks.