ref #7095 Cache description elements in row wrapper for performance

ref #7095 Disable cell editors for taxon node rows

Merge branch 'develop' into treeTable

Conflicts:¶

eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/workingSet/matrix/CharacterMatrix.java¶

ref #7095 Init description elements when activating cell editor

ref #7095 Handle dirty state of character matrix when editing

ref #7095 package restructuring