Duplicate dates and times in date polls create unwanted additional columns, breaking votes
When one creates a date poll with duplicate dates and same times (e.g. autofilled from first), then removing of some of these duplicate columns duplicates other duplicate columns, which changes already created votes.
Steps to reproduce:
- Create a date poll with a same date in two "lines"
- Autofill all the times, e.g. to morning, noon and evening
- Add a vote in the new poll
- Remove one of the duplicate columns
Note: This seems similar to issue #139 (closed), which is already closed, yet I've reproduced the bug today.