Improving favicon

Signed-off-by: Roman Schmerold (BNoiZe) <bnoize@froxlor.org>
Adding icon for touch devices

Signed-off-by: Roman Schmerold (BNoiZe) <bnoize@froxlor.org>
Redirect to last URL after relogin when session timed out, fixes #443

Signed-off-by: Roman Schmerold (BNoiZe) <bnoize@froxlor.org>