Fix skipped frames when interacting with the DataBroker

[Chrylo]

Describe the bug
Each click on get / update / subscribe leads to a:

"Skipped 33 frames!  The application may be doing too much work on its main thread."

To Reproduce

1. Interact with the Databroker in any test mode
2. Check logs for skipped frames

Expected behavior
No skipped frames / blocked UI thread

Additional context
Maybe related to the Coroutine Callback,...?)

Originally posted by @wba2hi in #108 (comment)