support cluster connection management #27
Description
users need to have easy access to clusters, including:
- can easily create a connection to a cluster with authentication(using credentials or login)
- see a user-friendly message when the connection succeeded
- see a user-friendly error message when the connection failed
- can check the cluster connection status( for example, through obvious mark on the cluster information)
- can re-connect to the previous connected clusters without inputting credentials or login repeatedly(unless the login status expired)
- can modify or remove existing cluster connection info