fixSortColumn doesn't always run

[dendeffe]

In the function getManipulatedData, I moved the call to fixSortColumn to the front, because it doen't always run properly otherwise.

No idea if this is the best solution, though.

    /**
     * Manipulate the datalist as needed by this grid modifier.
     * @param GridField $gridField Grid Field Reference
     * @param SS_List $dataList Data List to adjust
     * @return DataList Modified Data List
     */
    public function getManipulatedData(GridField $gridField, SS_List $dataList) {
        $this->fixSortColumn($gridField, $dataList);
        $headerState = $gridField->State->GridFieldSortableHeader;
        $state = $gridField->State->GridFieldSortableRows;
        if ((!is_bool($state->sortableToggle) || $state->sortableToggle==false) && $headerState && !empty($headerState->SortColumn)) {
            return $dataList;
        }

        if ($state->sortableToggle == true) {
            $gridField->getConfig()->removeComponentsByType('GridFieldFilterHeader');
            $gridField->getConfig()->removeComponentsByType('GridFieldSortableHeader');
        }


        //Detect and correct items with a sort column value of 0 (push to bottom)



        return $dataList->sort($this->sortColumn);
    }

[UndefinedOffset]

I applied this change in master, now that I think about it. It does make sense to enforce the sort even if the toggle is not on.