LP1901710: Properly nest HTML tags and TT2 directives

LP1901710: Properly nest HTML tags and TT2 directives

This is a first pass at cleaning these up and the W3C's
HTML validator is a lot happier about some of the pages,
but the advanced search page at least needs some TLC.

I'm having trouble getting the shelving location selector
to appear at all and the aria complaints will require more
fixing.

Signed-off-by: Jason Boyer <JBoyer@equinoxinitiative.org>
Signed-off-by: Garry Collum <gcollum@gmail.com>
Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>