Feature request: go back to previous wallpaper

[quietmansoath]

Hello, it would be great if there was an option to go back and use a previous day's wallpaper. On the official app from Bing for Windows, you can toggle back about 5 days or so. This way if I didn't like the one for the day, I could just hit back.

Otherwise, thank you for this really great extension. It's literally the best one out there for Bing and Gnome.

[manosnoam]

This would be very useful especially when the previous image is being replaced by a new image, before one could fetch details about the previous image (e.g. knowing description of previous image).

It happens daily that the menu is grayed out (non responsive) when the image is being replaced, so having an option to go to previous image would be nice indeed.

[neffo]

See #72