[Feature Request] Add Unsplash Background Image

[theMasix]

Hello. Thanks for awesome project.

As most-starred-projects update on daily/weekly/monthly basis, It may be interesting that a random or categorize-specific images used as newtab background image. These images could be retrieved using Unsplash API.

What I'm talking about is a field in githunt settings, that the user could enable Unsplash Background and in a better view, also specify the category of which images belong to. Then background images would be applied as newpage background image.