If anyone is interested in the Menu, Key and Build files for Sublime 3 to set it up, let me know.
Still having trouble with the liberty -M prog.bas parameter to start LB minimized though. If anyone knows how to solve the error "closeWindow: not understood", I'd sure appreciate the help. Also, I'm looking for the right command in Sublime to setup a "DEBUG" shortcut in addition to the existing RUN shortcut. The RUN shortcut uses the build command in Sublime which is automatically set to a specific command. I guess they didn't expect people to use different build configurations on the same source code.