vrplayer: some minor fixes

vrplayer/dlgabout.ui

@@ -23,7 +23,7 @@
     </rect>
    </property>
    <property name="text">
-    <string>VRPlayer v1.3</string>
+    <string>VRPlayer v1.4</string>
    </property>
   </widget>
   <widget class="QPushButton" name="okButton">

vrplayer/main.cpp

@@ -4,9 +4,9 @@
 
 int main(int argc, char *argv[])
 {
+    QApplication::setGraphicsSystem(QLatin1String("native"));
     QApplication a(argc, argv);
     MainWindow w;
     w.show();
-    
     return a.exec();
 }

vrplayer/mainwindow.cpp

@@ -153,8 +153,8 @@ void MainWindow::setupUI()
     lblVideo->setMinimumWidth(320);
     lblVideo->setMinimumHeight(200);
     QPalette palette = lblVideo->palette();
-    palette.setColor(lblVideo->backgroundRole(), Qt::black);
-    palette.setColor(lblVideo->foregroundRole(), Qt::black);
+    palette.setColor(lblVideo->backgroundRole(), QColor(0x00, 0x00, 0x01, 0xff));
+    palette.setColor(lblVideo->foregroundRole(), QColor(0x00, 0x00, 0x01, 0xff));
     lblVideo->setAutoFillBackground(true);
     lblVideo->setPalette(palette);
     hboxLayoutTop = new QHBoxLayout;