- Set src/dest defaults only in initial section create state, otherwise it
is impossible to specify output rules
- Get rid of dest_remote/dest_local widget switching and implement change
logic directly in tools.widgets.CBIZoneSelect
- Remove leftover debug code
Ref: https://github.com/openwrt/luci/issues/2889
Signed-off-by: Jo-Philipp Wich <jo@mein.io>