Display the total time spent per day in the calendar view

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Is your feature request related to a problem? Please describe.
I'm missing the information about the total amount of time per day I've spent on projects.

Describe the solution you'd like
It would be nice to be able to see the total amount of time in the calendar view. Maybe in a separate container at the bottom.
It's ok, if it were the total of all projects that day, even if they are intersecting.
Perhaps it would also be possible to display somewhere the total amount for the currently shown week/interval.?