Comment 11 for bug 690554

Since guessing what might went wrong on windows, I fixed the remaining issues (1 and 5) myself. Talking about (5): There already was a logic for positioning the pop up from the previous version. Since the pop up might be much bigger now, the given logic was not enough or even caused more problems than not using it at all. I improved the logic in a way, that the pop up always stays inside the image panel, apart from the case: The left border of the image panel may be breached to prevent hiding the event icon by the pop up.