UUID in ics export must be unique

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/uuid-in-ics-export-must-be-unique/
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The UUID in the ABRP ics export always seems to be "test-1". Since this is a unique identifier, it must be unique for at least every new route. Otherwise, the import of e.g. two different ics-files might fail because the importing calendar program considers it the same appointment (at least Google Calender works that way).

Possible solutions, which might fit for different use cases:

• Use the ABRP plan_uuid for this field
• Use just [Starting Point][DTSTART]
• Use both [Starting Point][DTSTART]-[End Point][DTEND]
  Thank you for fixing this!