Typo

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Style fix on XMPP footnote

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Fix black-on-black bxslider

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>