pfSense

Review license / copyright on all files (final round)

Always use require_once

The usage of require() and require_once() throughout the system is
inconsistent, and "bugs" come up now and then when the order of
"requires" is a bit different and some require() happens after the
include file is already included/required....

Fix form submission fields

Submitting one form may lead to any other filled forms to be also submitted. This commit fixes this flaw

(cherry picked from commit 592557140156767944d848ebb3ae4baab84464ec)

(diag > command prompt) page styling

Swap the colors on Diag > Command back. Executing is dangerous, hence the warning.

Changed the button colors and icons. The fa-terminal wasn't doing it for me :)

Fix typo

Bring some consistency to the way most buttons are displayed (color, icons, etc). Ticket #5965

Still need to review Advanced buttons and Repeatable block buttons.

Renamed exec.php and edit.php