pfSense

Restored interface tabs to dhcpv6.php
Changes dhcp/advertisements tab format in dhcpv6 and router_advertisements

Fixed #5385

Fixed #5384

Fixed #5381

Fixed #5382

Fix services_unbound.php. The interfaces menus did not display the selected
interfaces, they always showed "all" selected. Made it so an "apply changes"
message shows when something changes.

Fix cosmetic infoblock issue when there is more than one info_box on a page

Convert networks section to jQuert "repeatable" scheme and remove for($x=0;$x<4999 . ." code

Move "Add P2" button to left side to facilitate use of smaller screens
Fix HTML indenting

Correction per Phil Davis