Fixes 376: add description for status DHCP leases

Change cursor when hoovering over symbol within "Act" column of
normal firewall log to indicate that icon may be clicked.

Show a "log" icon if the RFC 1918 rule or the reserved IANA rules
are configured to be logged.

firewall: adopt formatting of RFC 1918 and IANA rules

Adopt style of RFC 1918 rule and reserved IANA rule to match user created
rules in style.

It's not very logical, but we'll be back refactoring this anyway...

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