Switching language redirects to calendar of current week

Ghost User
2019-06-20T14:16:36+02:00

### One-sentence description Because the calendar date is set by using an anchor (`#`), switching the language redirects to the events page without the date. ### Current behaviour / Reproducing the bug 1. Go to the [calendar](https://thalia.nu/events/). 2. Observe the calendar is on the current week. 2. Go to a specific week. 3. Switch language. 4. Redirect to current week (this may redirect to the homepage if #806 is not fixed yet). ### Expected behaviour When switching the language, the calendar does not reset to the current week.