Feature request: Add a save to file option

[noamtashma]

I love this so much! Thank you.

Can you please add an option to save as a file? I want to make a collection and it's inconvenient to go through the wallpaper.

[Rodrigodd]

There is a cli with a --output option. Also the gui saves the output to the file "wallpaper.png" in the current directory.

But there should really be a option in the GUI for setting the output path.