So only a ascending or descending sort of the list can be applied.
The only way to reset the sort is to reload the page.
Sorting of dates will work if all dates are within the same year; dates that span years will not sort properly - this is a limitation of the tinysort plugin.
The sort only applies to the elements on the current page; lists that continue on to other pages are not included.
* NOTE * Columns containing dates will not sort as expected because the tinysort library does not support it natively.