Merge review/1845: PR #1845 DGNIMPORT with fixes

# Conflicts:
#	src/app/commands/dgn_import.rs

locales/ru-RU/opencadstudio.ftl

@@ -6667,7 +6667,10 @@ dgn-import =
     .references = External DGN references
     .bind = Bind as block / xref
     .attach = Attach as DGN underlay
-    .references-note = Reference attachments of DGN files are not read; they are left out.
+    .existing = When the translated drawing exists
+    .prompt-overwrite = Prompt to overwrite
+    .overwrite = Overwrite without prompting
+    .keep-existing = Do not overwrite
     .mapping = Property mapping
     .mapping-standard = Standard mapping setup.
     .mapping-note = The preview shows the selected setup's effect on this file.