Bug 8899 [Revised] Remove unused CSS declarations from staff client CSS

Bug 8899 [Revised] Remove unused CSS declarations from staff client CSS

Using an add-on for Firefox called CSS Usage I found some
instances of CSS in staff-global.css which are unused. Unused
selectors were confirmed by a search of the code.

Testers can't exactly check the whole staff client for things
which look off, but can confirm by their own search that
the removed CSS has no corresponding markup.

Revision adds back lines which were discoverd by QA to be in use.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passed-QA-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>