100% zoom double click

[piko...@gmail.com]

I looked through the settings and could not find a way to configure the following two things that I think would be useful to have:

- Zooming out to be limited to the "Auto zoom" %.

- Double click to zoom where the mouse cursor is on the image, similar to the way the wheel zoom does it.

Maybe both of those things could be built in by default not needing a setting, as they seem logical to have.