Add an option to Proxy tab: "Do nothing"

I need to use custom proxy, and your add-on change proxy settings every time I launch Thunderbird.

Can you add an option "(O) Do nothing" to proxy tab, to force TorBirdy not to mess up my proxy settings?

I really need it, and I'm thinking about removing your add-on.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information