Add translations for missing help tooltips

Added help tooltips for:

- condition
- loans
- object_addendum
- transcriptions
- provenance

Also added missing translations for data history.

backend/de/data_history.json

@@ -19,6 +19,12 @@
         "visibility": "Sichtbarkeit",
         "type_of_edit": "Ge\u00e4ndert ...",
         "date": "am",
-        "user": "von"
+        "user": "von",
+        "transcription": "Transkription",
+        "restorationReport": "Restaurations-\/Konservierungs-Berichte",
+        "exhibition": "Ausstellung",
+        "loan": "Leihverkehr",
+        "provenance": "Provenienz",
+        "image": "Abbildung"
     }
 }