Improve how dots summarize a day

Now that we have colored dots to indicate events in the date time indicator it might be interesting to consider our options regarding how we summarize all the events in a day.

## Example day

## Current
The current systems creates one dot per event in the color matching it's calendar, with a max of 3 dots.
### Examples
- A day with 2 personal events will result in 2 personal colored dots.
- A day with 3 personal and a work event will result in 3 personal colored dots.
### Benefit
Gives a better idea of amount of events as long as it's less than 4 events.

## Android calendar
The month overview of the Android calendar on the other hand will show only one dot per color/calendar.
### Examples
- A day with 2 personal events will result in 1 personal colored dot.
- A day with 3 personal and a work event will result in 1 personal and 1 work colored dots.
### Benefit
Gives a better idea of the type of events during a day, as long as there are no more than 3 types during the same day.

## iOS
iOS puts one grey dot no matter how many events.
### Benefit
Simplicity.

I'm looking for more existing work (applications that have some kind of event dots concept), please share.

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