mwan3-luci: update to 1.3-2

mwan3-luci: update to 1.3-2

added support for new last_resort option for policy configuration
added dependencies for luci-mod-admin-full and luci-lib-nixio
shortened length of menuconfig description lines
reworded things on various pages
changed date formatting in custom hotplug script
default route checks now verify both destination/netmask are 0.0.0.0
condensed messy javascript lines and removed -F' ' from awk commands

Signed-off-by: Aedan Renner <chipdankly@gmail.com>