If you have a all day event or a task in the calendar view for current week, they are shown in a top panel above the regular calendar entries for that day.
A double click in that area should not create the default calendar entry (e.g. not create a ...
The "floating" properties is quiet annoying because you have to move it around the design area when it is on top of items.
For traditional Notes design elements (Forms, Views) it would be more handier to have the properties box appear in the Outline panel, simply because that panel ...
mostly if I click on a controls panel I want it to see what for options are in it, not to hide it.
therefor it is more logic that the default action is to expand, not to collapse.