Increase the space between date and time for Calendar events

[danielstreif]

@jarjan @pheeria I didn't find a way to insert visible spaces between date and time yet. The whole thing is in one string which is created in facebook.js. However, multiple spaces will not be shown in a browser. Using CSS seems to be the best solution but I'm not exactly sure how to implement it. Here a related question and here our code:

const stringifyEventDate = eventDate => {
  let result = "";
  const start = moment.parseZone(eventDate.start_time);
  const end = moment.parseZone(eventDate.end_time);

  if (start.isSame(end, "day")) {
    result = `${start.format("DD.MM.YYYY")} ${start.format(
      "HH:mm"
    )} - ${end.format("HH:mm")}`;
  } else {
    result = `${start.format("DD.MM.YYYY")} ${start.format(
      "HH:mm"
    )} - ${end.format("DD.MM.YYYY")} ${end.format("HH:mm")}`;
  }
  return result;
};