Act feed keeps showing progress indicator when fetchActions request is complete with `error`

[SamUndefined]

In the ActFeed, a circular progress indicator is being shown when the length of the actions list in AppState is equal to 0. This happens because it assumes that the fetchActions requests has not yet completed, or else the length of actions would be > 0. This is unreliable in the case that there are no actions (unlikely) or that the fetchActions request returns with an error.

There is already a boolean in AppState, called isLoading, that tracks whether or not the request itself has completed. This is should be used to decide whether to show the progress indicator in ActFeed instead of appState.actions.length.