Bug Fixx when target and source element in asssociation are same
a Lot of changes for drawing Names and Counting of connected element over association
New combobox dialog for picking up Counting of Association
new attr for disabling draging from another reason as internal reasons
Allowing self conecting with association... TODO: when only 2 points are setted asscoation is un reachable
Helper function for calculating angle in radians from 2 points
Helper function for calculating angle in radians from 2 points
added custom placeholder for more options when reuse
other changes cuz Association can by now named and counted