[FIX] hr_homeworking: don't show work location if not location set

In homeworking, we currently show the work location as false if a location is
not set. This commit fixes this issue by checking if the location is set before
rendering.

task-3570053

Part-of: odoo/odoo#139736

addons/hr_homeworking/static/src/calendar/common/calendar_model.js

@@ -72,7 +72,9 @@ patch(AttendeeCalendarModel.prototype, {
                     } else {
                         previousDay = dayISO;
                     }
-                    events[dayISO] = currentEvent;
+                    if (currentEvent.title) {
+                        events[dayISO] = currentEvent;
+                    }
                 }
             }
         }