function _onClickBtnEditCategory(evt){
            var target = $(evt.currentTarget);

            elements.editCategoryForm.data(target.data());
            elements.editCategoryName.val(target.data("categoryName"));
            elements.editCategoryForm.find("[name=isExclusive]").data("select2").val(target.data("categoryIsExclusive") + "");
            elements.editCategoryForm.modal("show");
        }
"click" event handler of edit category button.
Shows modal dialog element.editCategoryForm with .data() of clicked button.

@param evt
@private