Refs #8364 - removed javascript N+1 alerts

The N+1 is a nifty plugin but these javascript alerts are *killing* me and will
definitely ruin my today's demo which must be done in 2 minutes and 30 seconds
:-)

I beg for a quick merge. There is still the log and the footer box (which is
quite obvious and big). These are both non-modal but still useful.