* Fix API calls (pack_start)
* Fix logic update sensitivity in response to callbacks
* Cleanup white-space and re-indent
TODO: invert timeout behavior: opt-in to timeouts, not opt-out.
* use new PM API, allow to cancel individual scan
* cancel the scan when hiding the dialog (e.g.via Esc)
* show scan timeout time (count down/up)
* re-layout and re-label (work in process)