Default date for a plan

🚧 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/request-a-feature/default-date-for-a-plan/
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In Aug 2022, I planned a departure for Jan 2023. When coding for an overnight stay to depart the next day, I needed to bump the date by one day. When I opened the calendar, the month displayed was Aug 2022. Every time I coded another overnight stay, I had to click through 5 months to Jan 23 even though the trip plan begins in Jan 23. Very obnoxious, really. When I forgot to code the starting date, I subsequently changed the starting date. Every stop and waypoint continued to show the original, mistaken date. If a user updates a starting date, that should ripple through the entire plan, The overnight waypoint should be expected to be correct since they are manually updated when creating an overnight stay.