Allow syslog and eventlog to be set side-by-side on frontpage

This patch allows the admin to configure the eventlog and the syslog on the frontpage to be displayed side-by-side. This is useful when you have a wide monitor and/or you also have many devices alerting at once (and want to continue to be able to see some logs without scrolling as on a standalone dashboard).

Enable this option by setting

$config['splitlog'] = TRUE;

in config.php.
If you do not have both syslog and eventlog turned on they will continue to display full width.

I have attached both the patch and a screenshot of the resulting display.