fix for latent bug in HTML SELECTS which was only active in Safari

I named all the select fields the same name "rotation" which confused safari.  It would reset the previously entered value to "No assignment".  Other browsers seemed to do fine.  This led to inadvertent resetting of the schedule when I edited something in Safari.
Merge branch 'refs/heads/master' into Fix50
Merge branch 'Fix50' of https://github.com/grogo/schedule into Fix50