Fix #323: fix screen lost when minimized or re-open (#348)

Author: leplatrem

src/configeditor.cpp

@@ -252,7 +252,7 @@ void ConfigEditor::save() {
   QSettings settings;
   settings.beginGroup(QString("ScreenGeometry-%1").arg(m_preset));
   settings.setValue("name", ui->presets->itemText(m_preset));
-  settings.setValue("screen", qMin(0, ui->screens->currentIndex()));
+  settings.setValue("screen", qMax(0, ui->screens->currentIndex()));
   settings.setValue("x", ui->x->text());
   settings.setValue("y", ui->y->text());
   settings.setValue("w", ui->w->text());