Thanks a lot @ziplla for contributing this PR, much appreciated. It looks like the implementation keeps the state in memory in a static field, whereas it would be nice if this state would persist between workspace launches, so keeping this state somewhere in the workspace metadata would be great. Interested in making those adjustments here?

It would be something like:

File file = GotoSymbolPlugin.getInstance()
    .getStateLocation()
    .append("dialogSettings.json")
    .toFile();