A rather simple try.
Not made in Inkscape, can easily convert to SVG though or recreate entirely in Inkscape if necessary. I would have to clean it up a little anyway.
CTRL+C over whilst hovering over a button. Then CTRL+V whilst hovering over the button you would like to copy the value in to. Nice... didn't know that. :) What I really miss, though, is navigating input fields with TAB and/or arrow keys, like when entering coordinates manually. Blender way: Click,...