Add some admin settings checks

Signed-off-by: Suki <suki@missallsunday.com>
Remove unneeded settings

Signed-off-by: Suki <suki@missallsunday.com>
Delete moar unneeded settings

Signed-off-by: Suki <suki@missallsunday.com>
Show a category list on the side bar

Signed-off-by: Suki <suki@missallsunday.com>