Sortable: Skip items that are not at the same line as the cursor when floating. Fixes #8792: Issue with floated items in connected lists.
Sortable: Skip triggering over event if it's alreay over the continer. Fixes #9041: the over event fires on every pixel movement
Sortable Tests: Add tests to support #9041 and #8792
Draggable tests: Don't use .on().