Not possible to configure Ethernet without DHCP

[mvladic]

• Firmware version: 1.1
• Shield version Arduino, R5B12
• Powerboard version R5B12

Expected behavior

It should be possible to configure Ethernet without DHCP since option for that exists.

Actual behavior

Change in DHCP option is not saved.

How to reproduce

• Open Ethernet settings page.
• Set DHCP to No
• Press Set button
• Open Ethernet settings page again - DHCP is still set to Yes.