diff -r 4cfd0dd17fa5 -r 380b1331ad2e src/nulldateedit.cpp
--- a/src/nulldateedit.cpp	Wed Mar 30 17:21:43 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,55 +0,0 @@
-/**
- * Utils.cpp is part of bmsapp.
- *
- * See https://www.qtcentre.org/threads/17295-How-to-put-empty-value-in-QDateEdit
- *
- * bmsapp is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * bmsapp is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "nulldateedit.h"
-
-
-NullDateEdit::NullDateEdit(const QDate& date, QWidget* parent)
-	: QDateEdit(date, parent)
-{
-	this->setSpecialValueText("Null");
-}
-
-NullDateEdit::NullDateEdit(QWidget* parent)
-	: QDateEdit(parent)
-{
-	this->setSpecialValueText("Null");
-}
-
-NullDateEdit::~NullDateEdit()
-{
-}
-
-void NullDateEdit::clear()
-{
-	this->setDate(this->minimumDate());
-}
-
-QDate NullDateEdit::nullDate() const
-{
-	if (date() == this->minimumDate())
-		return QDate();
-	return date();
-}
-
-void NullDateEdit::setDate(const QDate & date)
-{
-	if (date.isNull())
-		QDateEdit::setDate(this->minimumDate());
-	QDateEdit::setDate(date);
-}