This calendar is used to show dates from production
areas i a time matrix.
There is a possibility to manipulate the dates within the matrix.
I the upper section of this calendar can be displayed some elements to change the size of calendar and kind of the dates.
The ammount of the calendar could make an error with the server request when to many dates should be displaed.
The calendar is allways showed from monday, so the choosen day may be only a part of the calendar.
If the calendar is showed as a part of a tab, the second click on this tab will refresh the dates. When the calendar is showed as a part of an area ther should be a button to refresh the displayed dates.