lettering: do not add commands on top of command connectors (#3528)

lib/lettering/font.py

@@ -519,9 +519,9 @@ class Font(object):
             for value in elements.values():
                 self._add_trim_to_element(Stroke(value), use_trim_symbols)
         else:
-            # find the last path that does not carry a marker and add a trim there
+            # find the last path that does not carry a marker or belongs to a visual command and add a trim there
             for path_child in group.iterdescendants(EMBROIDERABLE_TAGS):
-                if not has_marker(path_child):
+                if not has_marker(path_child) and not path_child.get_id().startswith('command_connector'):
                     path = path_child
                 element = Stroke(path)
             self._add_trim_to_element(element, use_trim_symbols)