add: a test connection

[starnakin]

feat request: add a test connection button or a return state label when you are fully connected to listenbrainz

[phw]

@regorxxx I had seen you had some patch for this in your fork, but it's gone now. Looked good to me from a quick look over the code. Do you still have the code changes and would you mind opening a PR with it?

[regorxxx]

Sorry, I forked the repository to build a release via github actions after merging all your branches (since I wanted to test both the genre submission and menu check bugfix). It seems github didn't let me to have a private fork in this case.

This branch in particular did not built properly and I simply left it without merging. Did not apply any code changes.

[phw]

Ok, I see. Thanks for the update