#959 Fixed label limit points with correct append

This was a simpler fix than I previously thought.
The data collector, inside a for loop,  was appending a fixed idx instead of the variable idx_limit_point.

atom_calibration/src/atom_calibration/collect/data_collector.py

@@ -573,7 +573,7 @@ def saveCollection(self):
                         labels_dict['idxs'].append(idx)
 
                     for idx_limit_point in pattern_label.idxs_limit_points:
-                        labels_dict['idxs_limit_points'].append(idx)
+                        labels_dict['idxs_limit_points'].append(idx_limit_point)
 
                     all_sensor_labels_dict[pattern_key][sensor_key] = labels_dict