ref #6925 Open "editors" in editor area

ref #6925 Add generic ExpandHandler

ref #6925 Implemente generic CollapseHandler

ref #6990 Evaluate preferences for search results

• open in navigation part stack

ref #6925 Open bulk editor in editor area

ref #6925 Refactor NavigationUtil.isDirty()

fix #6921 Migrate ABCD and GBIF import views

ref #6925 Fix part initialisation for open handlers

Merge branch 'develop' into bulkEditorE4

Conflicts:¶

eu.etaxonomy.taxeditor.editor/META-INF/MANIFEST.MF¶

eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/concept/e4/ConceptViewPartE4.java¶

eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/e4/FactualDataPartE4.java...¶

ref #6911, #6925 Clear views when selection providing editor is closed