4113 Offer only connectors in context menu of structural elements

Issue-Ref: 4113 Issue-Url: af3#4113 (closed)

Signed-off-by: Simon Barner barner@fortiss.org

org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/utils/.ratings

 AbstractNameEditingSupport.java c57336a0e0da18711a1610ca667dfea76728807f GREEN
 ActionUtils.java 322f43d4f92f992daef8ac88eb0f9197c840c89b GREEN
-ContextMenuUtils.java 74a4264a1d3febb92c7cf9a78f6c12fa1c7ad2f0 GREEN
+ContextMenuUtils.java 0f20d4918d0ca48d937c734aaa0c0e55e8fb4610 GREEN
 DragAndDropBaseUtils.java d375377f9124f6113b2a295e6b0e09ac8966e564 GREEN
 EllipseLayoutUIUtils.java 4dd9dbd96a45e8c455c019caa19e4a50f18336af GREEN
 FXDNDUtils.java 6ce94e239e68f9e2b3cc0524b072606f4a120076 GREEN