Ability to generate syncing scripts

[andrewiankidd]

With the scripting being handled within rclone itself, it stops users from being able to learn how rclone works properly. In an ideal world, everyone would use the CLI for syncing, so in an attempt to fix this, give an option to generate .bat files for syncing.
This can also be used to manage multiple syncs, maybe rewrite the sync screen as a bat editor

-Add button to sync screen to save settings as bat
-Add ability to load and edit bats