hotkeys for "fit to frame", "zoom to previous", and "1:1"

[wyowill]

The following hotkeys would be greatly appreciated:

- fit to frame (i.e. zoom to all)
- zoom to previous
- 1:1

I am working my way through a about 17,000 images with a fair bit of masking and over 1,000 photos with ground control points. Having the above shortcuts would easily speed things up by 15-20%...even more over a (slow) VPN.

Cheers,

Will

P.S. Would like to see these shortcuts for both photo and model panes.