Show qt version in About screen

src/about.ui

@@ -14,6 +14,7 @@
    <string>About</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
+
    <item>
     <widget class="QGroupBox" name="groupBox">
      <property name="title">
@@ -27,9 +28,19 @@
         </property>
        </widget>
       </item>
+
+      <item>
+       <widget class="QLabel" name="qtversion">
+        <property name="text">
+         <string notr="true">QT Version</string>
+        </property>
+       </widget>
+      </item>
+
      </layout>
     </widget>
    </item>
+
    <item>
     <widget class="QScrollArea" name="scrollArea">
      <property name="widgetResizable">

src/mainwindow.cpp

@@ -284,6 +284,8 @@ MainWindow::MainWindow(QWidget *parent) :
 
         QString version    = QString("Version ") % QString(APP_VERSION) % " (" % QString(__DATE__) % ")";
         about.versionLabel->setText(version);
+
+        about.qtversion->setText( QString("QT Version ") % QString(QT_VERSION_STR) );
         
         aboutDialog.exec();
     });