Several updates to support Cloudflared container setup along with other things

Since I'm running Pi-hole and Cloudflared in their own Docker containers on their own internal network I wanted to include the IP address of the Cloudflared container as one of the PIHOLE_DNS_1 servers.

Added additional CleanEcho's between the sections to make it easier to read on the mega screen size.

Changed IPv4 Adr: back to ${pi_ip_address} so that it would get the internal address of the Cloudflared container.

Added pi_external_ip_address=$(wget -qqO- 'https://duckduckgo.com/?q=what+is+my+ip' | grep -Pow 'Your IP address is \K[0-9.]+') to display External IP: in the Network section

Added CleanPrintf " %-10s%-39s\e[0K\n" "Screen Size: ${padd_size}" to display the screen size.