network: Add SUBMENU variable for some packages

network: Add SUBMENU variable for some packages

Add SUBMENU variable for some packages in Network category.
Add title for `dnscrypt-proxy` package.
Shorten TITLE variable for `xray-core` package.

Filesystem:
- cifs-utils

File Transfer:
- onionshare-cli

IP Addresses and Names:
- dnscrypt-proxy2
- family-dns
- https-dns-proxy
- mdns-repeater
- nextdns
- smartdns

Version Control Systems:
- git-lfs

Wireless:
- dawn

Signed-off-by: Ryan Keane <the.ra2.ifv@gmail.com>