Remove some qOverload as we remove deprecated qt5.15 signal

src/filter/filteractions/filteractionaddtag.cpp

@@ -39,7 +39,7 @@ QWidget *FilterActionAddTag::createParamWidget(QWidget *parent) const
     }
 
     setParamWidgetValue(mComboBox);
-    connect(mComboBox, qOverload<int>(&QComboBox::currentIndexChanged), this, &FilterActionAddTag::filterActionModified);
+    connect(mComboBox, &QComboBox::currentIndexChanged, this, &FilterActionAddTag::filterActionModified);
 
     return mComboBox;
 }

src/filter/filteractions/filteractionwidget.cpp

@@ -152,11 +152,11 @@ FilterActionWidget::FilterActionWidget(QWidget *parent)
     setFocusProxy(d->mComboBox);
 
     // now connect the combo box and the widget stack
-    connect(d->mComboBox, qOverload<int>(&QComboBox::activated), this, [this](int index) {
+    connect(d->mComboBox, &QComboBox::activated, this, [this](int index) {
         d->slotFilterTypeChanged(index);
     });
 
-    connect(d->mComboBox, qOverload<int>(&QComboBox::activated), this, &FilterActionWidget::filterModified);
+    connect(d->mComboBox, &QComboBox::activated, this, &FilterActionWidget::filterModified);
 
     connect(d->mAdd, &QPushButton::clicked, this, [this]() {
         d->slotAddWidget();

src/filter/filteractions/filteractionwithstringlist.cpp

@@ -24,7 +24,7 @@ QWidget *FilterActionWithStringList::createParamWidget(QWidget *parent) const
     comboBox->setEditable(false);
     comboBox->addItems(mParameterList);
     setParamWidgetValue(comboBox);
-    connect(comboBox, qOverload<int>(&QComboBox::currentIndexChanged), this, &FilterActionWithStringList::filterActionModified);
+    connect(comboBox, &QComboBox::currentIndexChanged, this, &FilterActionWithStringList::filterActionModified);
 
     return comboBox;
 }

src/snippets/snippetwidget.cpp

@@ -62,7 +62,7 @@ SnippetWidget::SnippetWidget(QWidget *parent)
         Q_EMIT textChanged(str);
         d->wasChanged = true;
     });
-    connect(d->mUi.groupBox, qOverload<int>(&QComboBox::currentIndexChanged), this, [this](int index) {
+    connect(d->mUi.groupBox, &QComboBox::currentIndexChanged, this, [this](int index) {
         Q_EMIT groupChanged(index);
         d->wasChanged = true;
     });