Steals focus if launched app restarts

[GeekJosh]

If a launched app restarts for some reason (e.g. Steam updates itself), BertUI steals focus from the app and must be closed in order to continue to use the app.

This is due to the way BertUI monitors the launched process. Plan to add a background worker to monitor for the relaunch of an app within a short time to detect these relaunches and hide BertUI accordingly.