connect solitary help button

git-svn-id: http://svn.osgeo.org/qgis/trunk@15579 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: borysiasty

src/gui/qgssearchquerybuilder.h

@@ -24,6 +24,7 @@
 
 #include "ui_qgsquerybuilderbase.h"
 #include "qgisgui.h"
+#include "qgscontexthelp.h"
 
 class QgsField;
 class QgsVectorLayer;
@@ -89,6 +90,8 @@ class GUI_EXPORT QgsSearchQueryBuilder : public QDialog, private Ui::QgsQueryBui
      */
     void on_btnSampleValues_clicked();
 
+    void on_buttonBox_helpRequested() { QgsContextHelp::run( metaObject()->className() ); }
+
     void saveQuery();
     void loadQuery();