Add new entry types to selection in musdb/object_addendum

backend/en/object_addendum.json

@@ -96,16 +96,24 @@
         "Colloquial speech",
         "Dialect"
     ],
-    "zugangsart": [
-        "",
-        "Donation",
-        "Purchase",
-        "Excavation",
-        "Extrication",
-        "Inheritance",
-        "Endowment",
-        "Dispossession",
-        "Original condition",
-        "Loan"
-    ]
+    "zugangsart": {
+        "0": "",
+        "1": "Donation",
+        "2": "Purchase",
+        "3": "Excavation",
+        "4": "Extrication",
+        "5": "Inheritance",
+        "6": "Endowment",
+        "7": "Dispossession",
+        "8": "Original condition",
+        "9": "Loan",
+        "10": "Exchange",
+        "11": "In-house production",
+        "12": "Material Strain (T\u00f6rzsanyag)",
+        "13": "decedent's estate",
+        "14": "Vorlass",
+        "15": "Finding",
+        "98": "To be checked",
+        "99": "Other legal acquisition"
+    }
 }