ref #6925 Refactor application model IDs and placeholders

ref #6925 Refactor application model IDs

Merge branch 'develop' into e4

ref #6159: smaller changes in distribution editor

Merge branch 'develop' into e4

Conflicts:¶

eu.etaxonomy.taxeditor.bulkeditor/fragment.e4xmi¶

eu.etaxonomy.taxeditor.editor/fragment.e4xmi¶

eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/EditorUtil.java¶

eu.etaxonomy.taxeditor.navigation/fragment.e4xmi...¶

use mediaUtils for getting the best matching media representation for mediaViewLabelProvider

cherry-pick from hotfix

ref #6925 Open distribution editor in editor area

cleanup

ref #6595 Remove exception from editor opening