qt: Make default button actually work

src/qt/qt_progsettings.cpp

@@ -203,3 +203,10 @@ void ProgSettings::on_horizontalSlider_valueChanged(int value)
     mouseSensitivity = (double)value / 100.;
 }
 
+
+void ProgSettings::on_pushButton_2_clicked()
+{
+    mouseSensitivity = 1.0;
+    ui->horizontalSlider->setValue(100);
+}
+

src/qt/qt_progsettings.hpp

@@ -59,6 +59,8 @@ private slots:
 
     void on_horizontalSlider_valueChanged(int value);
 
+    void on_pushButton_2_clicked();
+
 private:
     Ui::ProgSettings *ui;