Easy relaunch of incomplete and disconnected tasks

[JackUrb]

Overview

It's commonly the case (especially in pilots) that data that is annotated needs to be re-annotated due to misunderstood instructions or bad worker quality controls. It's also the case that in a coordinated live task, some data may not end up annotated because one of the workers disconnects, leaving the task as incomplete. We'd like to improve the experience for both of these cases

Implementation

For the first, this would involve extending the DataBrowser to allow querying all incomplete or rejected units, and then create a tools.scripts utility function that leverages it to construct a new set of static data to be fed directly to the SharedTaskState in a run script.
For the second, we'd need to modify the generators for the TaskLauncher to remain open for generating re-releases of incomplete tasks as they arise. One early attempt at doing this (and more discussion) can be found here: #224

[JackUrb]

Code for resuming an incomplete run is present in #910, but hasn't been tested.