Rethrow RepresentationException without mark info

When closing the editor, the metadata is saved as YAML, but the user
doesn't see it, so providing line and column info is pointless and
confusing.

src/gui/query/editor_closed_query.h

@@ -41,16 +41,9 @@ public:
       state_.decrementUnappliedChangeCounter();
 
       return json;
-    } catch (std::exception& e) {
-      // If this was a YAML conversion error, cut off the line and column numbers,
-      // since the YAML wasn't written to a file.
-      std::string error = e.what();
-      size_t pos = std::string::npos;
-      if ((pos = error.find("bad conversion")) != std::string::npos) {
-        error = error.substr(pos);
-      }
-
-      throw std::runtime_error(error);
+    } catch (YAML::RepresentationException& e) {
+      BOOST_LOG_TRIVIAL(error) << "Error while closing editor: " << e.what();
+      throw YAML::RepresentationException(YAML::Mark::null_mark(), e.msg);
     }
   }