Provide an option to "hide" the LDS tab

Immplements #3872.

gramps/gen/config.py

@@ -220,6 +220,7 @@ register('interface.size-checked', False)
 register('interface.statusbar', 1)
 register('interface.toolbar-on', True)
 register('interface.toolbar-text', False)
+register('interface.hide-lds', False)
 register('interface.view', True)
 register('interface.surname-box-height', 150)
 register('interface.treemodel-cache-size', 1000)

gramps/gui/configure.py

@@ -1374,6 +1374,11 @@ class GrampsPreferences(ConfigureDialog):
         grid.attach(lwidget, 1, row, 1, 1)
         grid.attach(obox, 2, row, 2, 1)
 
+        row += 1
+        self.add_checkbox(grid,
+            _('Hide LDS tab in person and family editors'),
+            row, 'interface.hide-lds')
+
         row += 1
         label = self.add_text(
             grid, _("* Requires Restart"), row,

gramps/gui/editors/editfamily.py

@@ -793,7 +793,8 @@ class EditFamily(EditPrimary):
                                             self.uistate,
                                             self.track,
                                             self.obj.get_lds_ord_list())
-        self._add_tab(notebook, self.lds_embed)
+        if not (config.get('interface.hide-lds') and self.lds_embed.is_empty()):
+            self._add_tab(notebook, self.lds_embed)
         self.track_ref_for_deletion("lds_embed")
 
         self._setup_notebook_tabs( notebook)

gramps/gui/editors/editperson.py

@@ -529,7 +529,8 @@ class EditPerson(EditPrimary):
                                      self.uistate,
                                      self.track,
                                      self.obj.get_lds_ord_list())
-        self._add_tab(notebook, self.lds_list)
+        if not (config.get('interface.hide-lds') and self.lds_list.is_empty()):
+            self._add_tab(notebook, self.lds_list)
         self.track_ref_for_deletion("lds_list")
 
         self.backref_tab = PersonBackRefList(self.dbstate,