GUI form typo fix for lcdproc-dev

A mindless little change - but since I just got a Firebox, tried this, and noticed the GUI text error, thought it may as well be fixed.
Also, this form has a mix of conventions for the field labels "Com Port" "Port speed"... That mix happens in lots of GUI forms. I wonder what the pfSense project standard is - each word starts in uppercase, or just the first word? e.g. The OpenVPN Server form has "Concurrent connections" and "Duplicate Connections", and subheadings "Tunnel Settings" and "Advanced configuration".