Seven bugfixes at one blow

Bug 943 will be famous for having so many duplicates. In short, it will make the user experience of the embedded browser much better on Windows. Most importantly, beginning with M9, JavaScript will be disabled by default (you can enable it again in preferences if necessary). This should make it much easier to use RSSOwl in areas, where IE is not allowed due to security concerns. Note that you can always switch over to using Mozilla inside RSSOwl, even on Windows.