commitmonitor Code

Make sure the diff viewer can't be made smaller than useful.

Add minimize/maximize buttons to the main dialog.
A minimize will result in closing the dialog, the same as clicking on the OK button.

Play a sound when new commits arrived.
Use the 'mail arrived' default system sound, but also add an option in the settings dialog to specify an own soundfile to play.

Clear the error after showing it.

Show an error message box when selecting a tree item, if there was an error the last time that url was accessed.

Limit the log to 10 revisions also if the start or end revision is 1.

Fill the error string if an error occurred, and clear it if the repository access was successful.

* save the last error
* add version info

Add method to retrieve the last error as a string.

Improve the search bar a little bit.