Problem Statement/Rationale

Somehow seems like diagramming package supports multi select, but we're not really handling it well

Steps to Reproduce

• Create a diagram with multiple collections
• Select one collection
• Without unselecting, press down CMD button (on macos) and now try dragging another collection

Expected Results

Either only one node moves or both nodes are moved and their position is preserved on drop

Actual Results

Both nodes move, but on drop only one keeps its position