(gui) Adds a new feature, to group elements in a new instance
(gui) Activate direct editing on new instance after grouping
(gui) Refactoring. Merge wizards and dialogs packages
(gui) NewNetworkWizard can or not open the created network
(gui) Use the NewNetworkWizard to select location of new network
(gui) Fix an error in GroupToInstance feature
(gui) Do not always update connections on instance refinement

If refinement is trigered from add() method, it is not necessary.
(gui) Simplify group instances features

Group is performed on instances only. Including existing ports in
the resulting network doesn't make sense
(gui) Refactoring

GroupToInstanceFeature -> GroupInstancesFeature
(gui) Ensure ports have unique names when grouping
Merge branch 'instances_grouping'