Add ability to customize format used to display dates throughout the application

fittrackee_client/src/components/Workout/WorkoutCard.vue

@@ -31,7 +31,7 @@
           :title="
             format(
               getDateWithTZ(workout.workout_date, user.timezone),
-              'dd/MM/yyyy HH:mm'
+              `${user.date_format} HH:mm`
             )
           "
         >

fittrackee_client/src/components/Workout/WorkoutDetail/index.vue

@@ -131,7 +131,8 @@
       getDateWithTZ(
         props.workoutData.workout.workout_date,
         props.authUser.timezone
-      )
+      ),
+      props.authUser.date_format
     )
     return {
       ascent: segment ? segment.ascent : workout.ascent,