Fixing artwork variable WidgetFanart

[omarmir]

The WidgetFanart uses landscape first, and landscape in Emby is the "Thumb" which is too small a resolution to look nice. Simple fix it seems to me and the fanart is better suited anyway.

[disrupted]

good one, I was wondering about this before as well, but was too lazy to look through the code at this point @omarmir

[xhaggi]

Sorry for the delayed answer but all GitHub email notifications were marked as spam on my side. I'll take a look at this asap and merge if good.