Fix date display (#410)

* fix homepage age

* fix misspelling

* remove log

frontend/src/app/widgets/patient-vitals-widget/patient-vitals-widget.component.ts

@@ -82,14 +82,17 @@ export class PatientVitalsWidgetComponent extends DashboardWidgetComponent imple
       return
     }
 
-    //process Patient objecst
+    //process Patient objects
     let sortedPatients = _.sortBy(queryResults?.[1], ['birthDate'])
     for(let patient of sortedPatients){
       if(!this.name && _.get(patient, 'name[0].family') && _.get(patient, 'name[0].given[0]')){
         this.name = `${_.get(patient, 'name[0].given[0]')} ${_.get(patient, 'name[0].family')}`
       }
-      if(!this.age && _.get(patient, 'birthDate')){
-        this.age = `${moment().diff(moment(_.get(patient, 'birthDate')), 'years')} years`
+      const birthDate = _.get(patient, 'birthDate');
+      if(!this.age && birthDate){
+        const birthDateString = Array.isArray(birthDate) ? birthDate[0] : birthDate;
+        const birthDateMoment = moment(birthDateString);
+        this.age = `${moment().diff(birthDateMoment, 'years')} years`; // moment.diff rounds down
       }
       if(!this.gender && _.get(patient, 'gender[0]')){
         this.gender = _.get(patient, 'gender[0]')