have an autotest to cover persistent data change:

e2e test: Load/Unload when multiple users sign in/sign out. Manually check
persistent metadata/component existence is corrrect after each operation.
 

have an autotest to cover Component storage space management:

1. Load/Unload when multiple users sign in/sign out. Component should be deleted IF and ONLY IF no user is using it.

2. Components should be cleaned up when account was deleted.