[FEATURE] More Note Colours

[Manngunner]

When notes are added to the calendar, the date gets a small circle added to it. Yellow for normal and purple for notes with reminders. It would be good if this could be customised where more categories of notes would create a different circle.

I think this would be good as you could differentiate, at a glance, between different kinds of events i.e. repeatable, important, historical, holidays etc.