If you move an appointment with mouse, you can move it in 5 minutes intervals. Problem: It is hard to move to appointment to the correct position, if often move them to 5 minutes earlier or later.

Two suggestions:
- For that timeframe 15 minutes should be the default. An option could be to setup this to another timeframe.
- There is a popup window at each calendar entry when we move the mouse there. It shows the calendar details. It would be nice if this would be displayed during the movement as well

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