wrong behaviour when baralga is closed without stopping the running activity

[AlisterH]

If I close Baralga without first stopping the running activity none of the subsequent behaviour makes sense.

• if I reopen it that activity is listed twice
• if I close and reopen again, the activity at the top of the drop-down is listed
• if I close and reopen again, the activity at the top of the drop-down is listed twice
• if I close and reopen again, the activity at the top of the drop-down is listed three times
• the time is added to these activities, not to the activity that I actually started
• if I start another activity, the button stays as a start button instead of changing to a stop button
• if I start another activity, the button finally changes to a stop button, and I can stop it, and the crazy behaviour finally stops.

v 1.9.8 on Windows