BBCode is a master setting.

Currently BBCode controls looks like controlling only Topics & Posts but not, BBCode settings under Posts & Topics is a master setting and something changed there effecting whole site, due that its better to be placed under more upper place.

Alternative fix; doing some additions to current system to respect sub-settings (Not sure maybe rewrite of HTML parsing & parse_bbc function).

fixes #1541
Signed-off-by: Antes <antes@simplemachines.org>