Add notes to the calendar

[stevejburge]

I think this has been suggested a couple of times now:

I used to use CoSchedule and frequently used the note option on their calendar. I created a draft for now in the PublishPress Calendar as a reminder that I'm republishing something that day so I can keep everything straight in the calendar, but the note feature would have been easier. Plus I used it for other content reminders (like social media.)