+/* starting at the end, looks backwards for the last "double point", a duplicate trackpoint.
+ * this is indicative of magic scissors continued use. If there is no double point,
+ * deletes all the trackpoints. returns new end of the track (or the start if
+ * there are no double points)
+ */
+VikCoord *vik_track_cut_back_to_double_point ( VikTrack *tr );
+
+void vik_track_set_property_dialog(VikTrack *tr, GtkWidget *dialog);
+void vik_track_clear_property_dialog(VikTrack *tr);