on for instance the slovenian keyboard, which i'm using, using control+ or
control- to zoom in or out in nautilus is not handy because + is on that
keyboard just on the left of backspace while - is just on the left of the right
shift.
it would be much handier to *also* let the user use the + and - of the keypad,
which are handily together at the right of the keyboard.
gimp also has this problem (but it's not so bad since it's easy to change
keyboard shortcuts in gimp, but i'll still make a bug report). inkscape does it
right.

there's no need to remove support for the existing +/- keys, just add support
for those on the keypad, that would be great.

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