JoystreamLibError is not properly handled in extrinsics

[drillprop]

To reproduce:

1. Go to extrinsics, find reactToVideoTx
2. Add

  throw new JoystreamLibError({
      name: 'FailedError',
    })

3. Like a video
4. You didn't get any output about the error(neither in the console, nor in the UI)

It looks like somewhere we don't properly handle JoystreamLibError, which could lead to really confusing situations.