Remove some qOverload as we remove deprecated qt5.15 signal

src/jobtrackersearchwidget.cpp

@@ -41,7 +41,7 @@ JobTrackerSearchWidget::JobTrackerSearchWidget(QWidget *parent)
     mSelectColumn->addItem(QStringLiteral("Job Type"), 4);
     mSelectColumn->addItem(QStringLiteral("State"), 5);
     mSelectColumn->addItem(QStringLiteral("Info"), 6);
-    connect(mSelectColumn, qOverload<int>(&QComboBox::currentIndexChanged), this, &JobTrackerSearchWidget::slotColumnChanged);
+    connect(mSelectColumn, &QComboBox::currentIndexChanged, this, &JobTrackerSearchWidget::slotColumnChanged);
 }
 
 JobTrackerSearchWidget::~JobTrackerSearchWidget()