Error displaying selected ICMP types for old rules without ipprotocol
1) Upgrade from a config that has an old rule that:
a) does not have 'ipprotocol' in its config (from the days before ipv4 vs ipv6)
b) uses ICMP with some ICMP types specified
2) Edit the rule
The ICMP types listed in the config are selected in the ICMP Types list on the GUI
The ICMP Types list in the GUI has nothing selected and defaults to "any"
Thus if the user does not notice and presses save, they lose the previously=selected ICMP types.