fix 2 bugs with reset-default failing on operators redo panel.

- The operator its self was registered so resetting the defaults would unhelpfully replace the toolbar with the reset to defaults operator panel.
- The callback for the operator wasnt being used so the settings were changed but the operator didnt re-run.

source/blender/editors/include/UI_interface.h

@@ -787,6 +787,7 @@ void UI_buttons_operatortypes(void);
 
 /* Helpers for Operators */
 void uiContextActiveProperty(const struct bContext *C, struct PointerRNA *ptr, struct PropertyRNA **prop, int *index);
+void uiContextActivePropertyHandle(struct bContext *C);
 void uiContextAnimUpdate(const struct bContext *C);
 void uiFileBrowseContextProperty(const struct bContext *C, struct PointerRNA *ptr, struct PropertyRNA **prop);
 void uiIDContextProperty(struct bContext *C, struct PointerRNA *ptr, struct PropertyRNA **prop);