Add translations for missing help tooltips

Added help tooltips for:

- condition
- loans
- object_addendum
- transcriptions
- provenance

Also added missing translations for data history.

backend/en/condition.json

@@ -23,6 +23,11 @@
         "creator": "Creator",
         "date": "Date",
         "delete": "Delete",
-        "type": "Type"
+        "type": "Type",
+        "report_title_explica": "The title of the conservation \/ restoration report. Should be a concise name that helps identifying the report.",
+        "report_content_explica": "Content of the conservation \/ restoration report.",
+        "report_type_explica": "Type of the report.",
+        "report_creator_explica": "Name of the author of the report.",
+        "report_date_explica": "Date of the report creation."
     }
 }