feat: import the mime-type for each comment

Author: ionlizarazu

src/collective/exportimport/import_other.py

@@ -635,7 +635,8 @@ def import_data(self, data):
                 conversation = IConversation(obj)
 
                 for item in conversation_data["conversation"]["items"]:
-
+                    if isinstance(item["text"], dict) and item["text"].get("mime-type"):
+                        item["mime-type"] = item["text"]["mime-type"]
                     if isinstance(item["text"], dict) and item["text"].get("data"):
                         item["text"] = item["text"]["data"]
 
@@ -654,6 +655,7 @@ def import_data(self, data):
                         .replace(u"\r<br />", u"\r\n")
                         .replace(u"<br />", u"\r\n")
                     )
+                    comment.mime_type = item.get("mime-type", None)
 
                     if item["user_notification"]:
                         comment.user_notification = True