Update jquery.sortable.js Destroy

[Helidium]

The destroy method doesn't clean itself properly. I dont know if this is the proper way of doing it, but in my code this works. Can you please make a full cleanup so no memory leaks are existing in case of spa ( Single page application )

[daftspunk]

👍 x999

If this PR is no good, there needs to be some way to destroy a group completely because the first call group options persist and may contain callbacks which are destroyed. So the second call uses options with a bunch of dead references.

Could this work?

$(...).sortable('destroyGroup', 'group_name');