Add tooltip to links in styled text editor

Fixes #10179.

gramps/gui/widgets/styledtexteditor.py

@@ -62,7 +62,7 @@ from ..spell import Spell
 from ..display import display_url
 from ..utils import SystemFonts, get_primary_mask, get_link_color
 from gramps.gen.config import config
-from gramps.gen.constfunc import has_display
+from gramps.gen.constfunc import has_display, mac
 from ..actiongroup import ActionGroup
 
 #-------------------------------------------------------------------------
@@ -315,7 +315,9 @@ class StyledTextEditor(Gtk.TextView):
             if url.startswith("gramps://"):
                 obj_class, prop, value = url[9:].split("/")
                 display = simple_access.display(obj_class, prop, value) or url
-        return display
+        return display + ((_("\nCommand-Click to follow link") if mac() else
+                           _("\nCtrl-Click to follow link"))
+                          if self.get_editable() else '')
 
     def on_button_release_event(self, widget, event):
         """