Hi
Indeed there are files loaded with http instead of https in fron of them. The most likely it's because of the file:
http://code.jquery.com/jquery-migrate-1.4.1.min.js no idea where is it loaded from so can't tell You where to change it, but You same libraries are provided by joomla, so You should just disable it. If You will have problems to locate it You can always use Easy jQuery plugin where You will find an option to change all about jQuery and choose a location to load it from and a protocol of course.