Device dialog throws connection in use error

[glopesdev]

This seems to be either when a temporary connection to the device has been opened to update the name of the Device node, or when quickly switching COM ports. It is worth testing if a few delayed retries might solve the issue, otherwise either find a way to know when the COM port is free or show a more friendly dialog box offering the option to retry the connection.

[glopesdev]

Something we noticed today is that changing the selected COM port int the drop-down may not update the actual device connection, since the label in the status bar can indicate the previously selected device.