tch-gui-unhide

Added Network Operators to Mobile tabs to add/edit MCC/MNC values
Added auto refresh to Telephony card
Stop all auto-refreshes when any modal opened
Fixed icon display issue on Telstra Classic theme [#19]
Allowed add/delete of dial plan entries
Clarified PoS on Telephony Codecs tab
Allow entry of SIP Domain Name and Realm
Optionally use a decrypted text field (instead of masked password field) for SIP Profile passwords
Allow assignment of IPv6 address to router via DHCP without LAN prefix
Show individual helper status on NAT Helpers card
Moved WAN Sensing L3 status from Internet Access card to Broadband card with L2 status
Added DNS Server IPs to Internet card [#20]
Standardised IPv4 and IPv6 DNS settings across DHCP/PPPoE/Static Internet Access modal snippets, plus added ability to enable/disable auto-discovery of ISP IPv6 DNS servers

Extras

tch-gui-unhide-xtra.minidlna: Correctly restore /lib/functions/contentsharing.sh after minidlna opkg removed
tch-gui-unhide-xtra.samba36-server: Correctly restore /lib/functions/contentsharing.sh after samba36-server opkg removed