When saga error occurred, it should not turn into disconnect

[compulim]

Version

master

Describe the bug

There are two problems:

• When saga error, it disconnect Direct Line. Connectivity status turn from "sagaerror" to "disconnected"
• But since there is a bug in "disconnected" reducer, an exception prevented "sagaerror" turn into "disconnected", but result in an exception

To Reproduce

1. Open playground
2. Click "Inject error"

Expected behavior

Check console log, there should be no exception other than the saga error. And the connectivity status should say, "Render error. Please check the console or contact the bot developer."

[Bug]