axis: fix display of the lockButton. Never show it when in manual or read mode

close #694

tomwer/gui/reconstruction/axis/radioaxis.py

@@ -1798,6 +1798,9 @@ class _CalculationWidget(qt.QWidget):
             self._qcbPosition.setCurrentIndex(index)
         else:
             raise ValueError("Unagle to find mode", mode)
+        self._lockMethodPB.setVisible(
+            mode not in (axis_mode.AxisMode.manual, axis_mode.AxisMode.read)
+        )
         self._qcbPosition.blockSignals(old)
 
     def _nearValueChanged(self, *args, **kwargs):