About dialog: Forgot to Show() the image when present.

Change-Id: I6a1901e3a47e6e46e84da955872a97e016ce0694

cui/source/dialogs/about.cxx

@@ -204,6 +204,7 @@ void AboutDialog::LayoutControls()
         aLogoBitmap = aRasterizerLogo.Rasterize( aLogoSize );
         aLogoImage.SetImage( Image( aLogoBitmap ) );
         aLogoImage.SetPosSizePixel( aLogoPos, aLogoSize );
+        aLogoImage.Show();
     }
 
     // Position version text