P: Fit without zooming

I'd like an addition choice besides fit and fill in the navigator panel.   When selected the option should show the image at full size (100%) or fit the window, whichever is smaller.

I often work in the develop module with the left panel closed so don't have quick access to the navigator.  I toggle between fit and whatever my current zoom level is by hitting the space bar.   This us usally what I want -- except when I'm working with lower resolution images on a 5K monitor.  In that case the fit option expands the image beyond the 100% zoom level and I wonder why the image is so fuzzy until I realize what is going on.  I can use the keyboard shortcut to see a 100% view -- but then I lose whatever zoom level I was working in.

An option that tells fit to not expand images would be a suitable alternative.