Issue #2093177 by enorniel, d.pagkratis : Nice try enorniel but the problem is fixed just by adding an the isset funtion for the triggering elemnt's field name in the if statement in line 357.

Issue #1981432 by Ganzeiba , d.pagkratis : We added a checkbox in the edit form where you can select if you want the price to be displayed or not.

Issue #2004062 by TravisJohnston , d.pagkratis : The error is fixed. The problem was caused from the ajax callback impacting on trying to change the price value and then the function was trying to make also the change. Your solution was not the best because you were setting the price to zero before the if statement

Issue #1910598 by georgemastro, nchar: Implement select all/select none checkbox in aministration area.

Issue #1903502 by chriscalip, nchar: added functionality of AJAX price refresh when an attribute widget is changed.