Group name can be set using its constructor
modified Vertex popoved to display its attributes
double-click to zoom in
fixed Vertex to display its name w/o archetype
changed title of Sidebar unconnected nodes list
replaced Vertex interface icon by icon according to its archetype
replaced Edge lollipop by arrow
vertex/edge archetypes are stored in App
dropped unused functionality
fixed paths
moved frontend code to directories following Maven convention, dropped libraries that are managed by Maven