* fixed IP configuration
* set up a new ipv4settings object to avoid the need of reseting all the values
* extended Static IP configuration:
* allow configuration of netmask (optional)
* allow configuration of Gateway (optional)
* allow configuartion of two DNS Servers (optional)
* extend DHCP configuration:
* allow configuration of user specific DNS Server
* DHCP provided DNS Servers will be ignored in that case