Provide translations for timeago.js

[anarion80]

In places where we use timeago.js, for example to display Last Seen as "just now", add support for locales.

Something like:

import pl from 'timeago.js/lib/lang/pl';
timeago.register('pl', pl);
render(record) {
  if (record.lastSeenAt) {
    return timeago.format(record.lastSeenAt * 1_000, 'pl')
  }
}

but for all supported languages and display in the currently selected one.