Gitlab: improve error handling when initializing the Repository ID #352
Description
Currently, a generic Repository Name is invalid message is stored in hub_repoid when the Repository ID could not be retrieved from Gitlab API.
This can be misleading, as there are other error scenarios:
- Invalid URL or unable to reach server (e.g. network problems)
- Bad API Key
- API Key with insufficient privileges
- Invalid Repo name
The system should provide a more specific error message, and warn the user that something went wrong (currently, an "Operation successful" banner is printed in all cases.