FIX: powder_eq display for the calibration dialog

Former-commit-id: 85854ff [formerly 85854ff [formerly ed5dd12 [formerly 812cd66]]]
Former-commit-id: ed5dd12
Former-commit-id: 376e64b
Former-commit-id: aeb3b92
Former-commit-id: 26f60e2

iris/gui/gui.py

@@ -323,7 +323,7 @@ def launch_recompute_angular_average_dialog(self):
 
     @QtCore.pyqtSlot()
     def launch_calq_dialog(self):
-        I = self.controller.dataset.powder_eq()
+        I = self.controller.dataset.powder_eq(bgr = True)
         dialog = QCalibratorDialog(I, parent = self)
         dialog.resize(0.75*self.size())
         dialog.calibration_parameters.connect(self.controller.powder_calq)