EDIT

no longer deleting registration when typedesignation editors are canceled

ref #6740 enabling typeName button in NameTypeDesignation editor and first changes to make delete working

ref #7195 creating blocking relations and showing 'em in the listView

new TaxonEditorMode: requireNomenclaturalReference

fitering TaxonEditorModes before passing to basionym editor

ref #7195 enabling and highlighting blockedBy button

ref #7195 introducing the concept of EditorActionContext stacks to facilitate creating blocking relations

fixing event scope problem

fix #7231 replacing SpringApplicationEventBus by scoped Vaadin4Spring Event Bus

ref #6740 NameTypeDesignationEditor layout finetuning