Add the Qt version that qgis is compiled and running against into the

Help:About dialog box. There seems to a number of bugs reported
nowadays that relate to the version of Qt that qgis is using, so an
easy way for the user to find out the Qt version will be handy.


git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5746 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/gui/qgisapp.cpp

@@ -59,6 +59,7 @@
 #include <QToolTip>
 #include <QVBoxLayout>
 #include <QWhatsThis>
+#include <QtGlobal>
 //
 // QGIS Specific Includes
 //
@@ -1210,6 +1211,9 @@ versionString += tr(" with PostgreSQL support");
 
 versionString += tr(" (no PostgreSQL support)");
 #endif
+ versionString += tr("\nCompiled against Qt ") + QT_VERSION_STR
+   + tr(", running against Qt ") + qVersion();
+
 #ifdef WIN32
   // special version stuff for windows (if required)
   //  versionString += "\nThis is a Windows preview release - not for production use";