commitmonitor Code

Add a toolbar for the various commands.

Fix compiler warnings.

Use predefined messages instead of using RegisterWindowMessage()

Don't select a log entry when selecting a tree item.

Only update the view if the data *really* has changed.

* use a better, reentrant reader/write section class
* refresh the UI in a timer interval

After deleting items, automatically select the previous item.

Block the custom draw handler of the list control while the control data is updated/changed.

Start the internal diff viewer if it isn't configured otherwise in the registry.

Reorganize the main dialog.