add default help location to the global settings (refs #17670)

Author: alexbruy

resources/qgis_global_settings.ini

@@ -28,3 +28,8 @@ connections-xyz\OpenStreetMap\url=http://a.tile.openstreetmap.org/{z}/{x}/{y}.pn
 connections-xyz\OpenStreetMap\username=
 connections-xyz\OpenStreetMap\zmax=19
 connections-xyz\OpenStreetMap\zmin=0
+
+[help]
+# Default help location to inlude
+# for now this is online version fo the User Guide for latest (LTR) release
+helpSearchPath=https://docs.qgis.org/$qgis_short_version/$qgis_locale/docs/user_manual/