Current schema requires gender.
Try to improve appearance.
Ensure position is set adding/removing people.
Don't delete values that may not have been set.
Rename search terms to plural.
Centre description text again.
Fix previous commit.

Went overboard in c93c1660d3a96ee7372ff486ff3dd1f45563c668 and changed
terms that shouldn't have been changed.
Fix error setting categories.
Hide URL if there is no URL.
Hide stuff from slideshow.
Updates to main menu.
Remove previous slide before displaying new one.
Fix position of arrow controls in slide show mode.
More arrows around in non-slideshow mode.