It's now possible to share items to different Course Lists. This effectively allows you to make bulk changes to your Course Lists, adding or removing a course/section from multiple lists at a time.
First, use the selection buttons on the Course Lists listing to choose which Course Lists you want to share an item with.
Second, open a Course List that contains the item you want to share. Click the arrow button on that item, and you will be shown a confirmation window. Clicking "OK" here will immediately add that item to your selected Course Lists.