Draft: Sync calendar with entries on journal page

[meimeisuns]

Currently adds two things:

1. Shows you entries from the month you switch to
   If you switch to another month, no longer will it continue to display the entry from the last date that you clicked. It will now default to showing you entries starting from the end of the month.
   

2. Cut off entries at beginning of month
   If you clicked on an entry near the beginning of the month, you might have gotten some entries from last month mixed in. It was hard to tell which entries were from which month. Now, it will make sure to only show you entries from the current month after you click the calendar, unless you elect to load more past entries.
   

Things to look into:

• Relative time headers for the journal (e.g., "Today", "last week", "last month", "Apr 2021") and also sprinkled throughout the timeline
• Only show the entry from that day when you click a date? If you clicked on a day without anything going on you would expect to see nothing, but we currently will see any past entries. That might be confusing.
• Feels a little weird to display entries starting from the end of the month when switching to months. I almost expect the ordering to be from the beginning, but that doesn't really make sense either. Then again, I don't look primarily at the journal when I switch months... Anything different we can do here? Perhaps not show anything until a user clicks to keep their focus on the calendar?