Association has to be rerendered when elements resizes

[TobiasPr]

Describe the bug

Noticed a minor bug. If there is an element connected to the package and you resize an inner element of the package so that the package is extended as well, the association to the package is displayed at the previous position. However, if after that I resize the package element, the association automatically re-positions.

To Reproduce

1. Create a package with a class inside and a class outside
2. Connect the outer class to the package (right side)
3. Resize the inner class, so that the package size gets adjusted at the side where the connection is
4. The connection to the package is positioned wrongly

Expected behavior

Correct rendering of the connection

Screenshots