Tasks view; If grid is sorted, action buttons may not enable/ disable correctly and the wrong item may be actioned

If no row selectors are checked in a grid in the Tasks view, the current row is assumed.

However, if one of the grid's columns are sorted, the display index of the selected row (as displayed on the row selector) was being used as opposed to the row's original, unsorted index.

This could cause unpredictable results and may cause the incorrect item to be actioned.