Submitting a new mapping file resets all user opts

[mooreryan]

It would be nice if submitting a new mapping file would keep all the user options in place

[BagiM]

I second this request not only for new mapping file but also for uploading new tree file. I have bunch of trees I am trying to draw consistently styled. Resetting all options with each uploaded tree makes this laborious and especially difficult for options changed by sliding bar.