Bug 30952: Header search - move tabs to the right (and other tweaks)

Bug 30952: Header search - move tabs to the right (and other tweaks)

Make the search bar take the whole page width, with inputs at the center
taking all the available space
Add a separator between inputs when there are more than one

Issue #24

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>