Bug 2553 [Serials report] alphabetize dropdown menus

Bug 2553 [Serials report] alphabetize dropdown menus

Rebase of a patch originally submitted by gcollum@gmail.com
Original commit message:

Improvement on the previous patch through the use of GetBranchesLoop.
Added code so that the logged in location will be the location that
is selected by default.

Fixed a couple of minor xhtml errors.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>