Forward Firewall: Design changes

Forward Firewall: Design changes
1) source has a new option "firewall" with dropdown for interfaces
2) source default networks->deleted IPFire, all ip's now in brackets
3) deleted warning message in Target that a mac is not usable
4) changes for "apply" button
5) in ruletable the protocol is now right beneath the ruletype column
6) changed target dropdown "INTERNET" to "RED"
7) renamed OpenVPN N-2N to OpenVPN Net-to-Net
8) set missing default firewall options
9) little changes on the en and de lang files