Fix display of help links in gramplet bars

Use `display_help` rather than `display_url` to display manual
pages. The webpage and section need to be passed in separately
so that a translated url can be constructed.

Section headings in the translated manuals should include the
untranslated headings as invisible anchors.

gramps/gui/widgets/grampletbar.py

@@ -57,7 +57,7 @@
 from gramps.gen.const import GRAMPS_LOCALE as glocale
 
 _ = glocale.translation.gettext
-from gramps.gen.const import URL_MANUAL_PAGE, URL_WIKISTRING, VERSION_DIR
+from gramps.gen.const import URL_MANUAL_PAGE, VERSION_DIR
 from gramps.gen.config import config
 from gramps.gen.constfunc import win
 from gramps.gen.utils.configmanager import clean_up
@@ -81,13 +81,8 @@
 # Constants
 #
 # -------------------------------------------------------------------------
-WIKI_HELP_PAGE = URL_WIKISTRING + URL_MANUAL_PAGE + "_-_Gramplets"
-WIKI_HELP_GRAMPLETBAR = (
-    URL_WIKISTRING + URL_MANUAL_PAGE + "_-_Main_Window#Bottombar_and_Sidebar"
-)
-WIKI_HELP_ABOUT_GRAMPLETS = (
-    URL_WIKISTRING + URL_MANUAL_PAGE + "_-_Gramplets#What_is_a_Gramplet.3F"
-)
+WIKI_HELP_PAGE = URL_MANUAL_PAGE + "_-_Gramplets"
+MAIN_HELP_PAGE = URL_MANUAL_PAGE + "_-_Main_Window"
 NL = "\n"
 
 
@@ -642,11 +637,11 @@ def gramplet_panel(configdialog):
 
     def on_help_grampletbar_clicked(self, dummy):
         """Button: Display the relevant portion of Gramps manual"""
-        display_url(WIKI_HELP_GRAMPLETBAR)
+        display_help(MAIN_HELP_PAGE, "Bottombar_and_Sidebar")
 
     def on_help_gramplets_clicked(self, dummy):
         """Button: Display the relevant portion of Gramps manual"""
-        display_url(WIKI_HELP_ABOUT_GRAMPLETS)
+        display_help(WIKI_HELP_PAGE, "What_is_a_Gramplet?")
 
 
 # -------------------------------------------------------------------------