If you get disconnected, it's a bug on gvfs not Sublime, and the fix is to run this script, which prevents FTP from disconnecting
echo -n -
ls ~/.gvfs/FTP* &> /dev/null
Just save this file and "chmod +x" it, then call it from the terminal, then throw that terminal window in an unused workspace.
I must Thank:
Daniel Scholtus (sdeonline) for the script: bugs.launchpad.net/ubuntu/+sour ... bug/410288 (comment #35)