Suppress age = 0 days in events list

If the reference event date is equal to the event date, don't show the age
except if the date is estimated, calculated, ...

Fixes #0007745

gramps/gui/editors/displaytabs/eventrefmodel.py

@@ -46,7 +46,7 @@ from html import escape
 #
 #-------------------------------------------------------------------------
 from ...widgets.undoablebuffer import UndoableBuffer
-from gramps.gen.lib import EventRoleType
+from gramps.gen.lib import (EventRoleType, Date)
 from gramps.gen.datehandler import get_date, get_date_valid
 from gramps.gen.config import config
 from gramps.gen.utils.db import get_participant_from_event
@@ -175,6 +175,9 @@ class EventRefModel(Gtk.TreeStore):
         """
         date = event.get_date_object()
         if date and self.start_date:
+            if date == self.start_date and date.modifier == Date.MOD_NONE:
+                return ""
+            else:
                 return (date - self.start_date).format(precision=age_precision)
         else:
             return ""

gramps/plugins/gramplet/events.py

@@ -32,6 +32,7 @@ from gi.repository import Gtk
 from gramps.gui.editors import EditEvent
 from gramps.gui.listmodel import ListModel, NOSORT
 from gramps.gen.plug import Gramplet
+from gramps.gen.lib import Date
 from gramps.gen.plug.report.utils import find_spouse
 from gramps.gui.dbguielement import DbGUIElement
 from gramps.gen.display.place import displayer as place_displayer
@@ -129,6 +130,9 @@ class Events(Gramplet, DbGUIElement):
         date = event.get_date_object()
         start_date = self.cached_start_date
         if date and start_date:
+            if date == start_date and date.modifier == Date.MOD_NONE:
+                return ""
+            else:
                 return (date - start_date).format(precision=age_precision)
         else:
             return ""