[issue] Daylight saving time

Thanks for this awesome app!
There is a bug most probably concerning daylight saving time.
When I try to create a poll /event on the 29.10.17 eg at 10:00 the event poll shows 09:00 (german time zone). Further on, it is not possible to remove this wrong time from the grid.

Good find. Seems that this happens only on the day, the day light saving changes.
Github issue: https://github.com/nextcloud/polls/issues/211