Connect the Help button in the repository reference editor

Fixes #13352.

Author: stevenyoungs

gramps/gui/editors/editreporef.py

@@ -36,12 +36,22 @@
 _ = glocale.translation.gettext
 from gramps.gen.lib import NoteType
 from gramps.gen.db import DbTxn
+from gramps.gen.const import URL_MANUAL_SECT2
 
 from .displaytabs import NoteTab, AddrEmbedList, WebEmbedList, SourceBackRefList
 from ..widgets import MonitoredEntry, PrivacyButton, MonitoredDataType
 from .editreference import RefTab, EditReference
 from ..glade import Glade
 
+# -------------------------------------------------------------------------
+#
+# Constants
+#
+# -------------------------------------------------------------------------
+
+WIKI_HELP_PAGE = URL_MANUAL_SECT2
+WIKI_HELP_SEC = "Repository_Reference_Editor"
+
 
 # -------------------------------------------------------------------------
 #
@@ -84,6 +94,9 @@ def _local_init(self):
     def _connect_signals(self):
         self.define_ok_button(self.top.get_object("ok"), self.ok_clicked)
         self.define_cancel_button(self.top.get_object("cancel"))
+        self.define_help_button(
+            self.top.get_object("help"), WIKI_HELP_PAGE, WIKI_HELP_SEC
+        )
 
     def _connect_db_signals(self):
         """