pfSense

UPnP STUN configuration. Feature #10587

Fix PHP7 error in miniupnpd.inc

Some tweaks to improve alignment in table with checkbox

1) If a checkbox does not have a description (even if it is empty), layout will be broken as checkbox won't be aligned correctly

2) UPnP checkbox looks better with description instead of help

This commit fixes the two issues

Whitespace cleanup

Make model_number customizable

Make presentation_url customizable

More icon and button consistency fixes. Ticket #5965

Fix formatting on the UPnP page, fixes #5970

Remove additional_files_needed entries

Set secure_mode=yes in miniupnpd config. Ticket #5627