1278: Improve image handling esp. when not available

Task-Url: https://pm.winseda.de/issues/1278

messages_de.properties

@@ -459,6 +459,7 @@
 ~eu.dariah.de.minfba.search.view.item.links                                                     = Links zur Ressource
 ~eu.dariah.de.minfba.search.view.item.no_dataset                                                = Datensatz nicht verf\u00FCgbar
 ~eu.dariah.de.minfba.search.view.item.original_dataset                                          = Datensatz im Original
+~eu.dariah.de.minfba.search.view.item.presentation_metadata                                     = Pr\u00E4sentations-Metadaten
 ~eu.dariah.de.minfba.search.view.item.preview                                                   = Vorschau
 ~eu.dariah.de.minfba.search.view.item.processing_hints                                          = Verarbeitungshinweise
 ~eu.dariah.de.minfba.search.view.labels.add_facet                                               = Facette hinzu

messages_en.properties

@@ -339,6 +339,7 @@
 ~eu.dariah.de.minfba.search.view.item.links                                                     = Links for the resource
 ~eu.dariah.de.minfba.search.view.item.no_dataset                                                = Dataset not available
 ~eu.dariah.de.minfba.search.view.item.original_dataset                                          = Original dataset
+~eu.dariah.de.minfba.search.view.item.presentation_metadata                                     = Presentation metadata
 ~eu.dariah.de.minfba.search.view.item.preview                                                   = Preview
 ~eu.dariah.de.minfba.search.view.item.processing_hints                                          = Processing notes
 ~eu.dariah.de.minfba.search.view.labels.add_facet                                               = Add facet