Problem

There is currently no way to know if the code completion is available and its configuration valid.

The only way to have this information is to check the network requests.

Proposed Solution

Add an indicator that display the status of the code completion (perhaps in the status bar, at the bottom of the application).

Additional context

In addition, I am not sure that there is a way to disable the code completion currently. We could take advantage of this change to add a setting about disabling code completion.