Skip focus mode for powder/laue calibration

It keeps on causing issues, so let's just disable it for now.

We can enable it as long as we are sure that this issue will not
happen again: #1556

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

hexrdgui/calibration/calibration_runner.py

@@ -85,8 +85,13 @@ def validate(self):
             raise Exception('There are no refinable parameters')
 
     def enable_focus_mode(self, b):
-        HexrdConfig().enable_canvas_focus_mode.emit(b)
-        HexrdConfig().enable_canvas_toolbar.emit(not b)
+        # FIXME: We must avoid using focus mode until we can be sure
+        # that this issue will not happen again: https://github.com/HEXRD/hexrdgui/issues/1556
+        # We *cannot* allow the GUI to remain disabled after calibration.
+
+        # HexrdConfig().enable_canvas_focus_mode.emit(b)
+        # HexrdConfig().enable_canvas_toolbar.emit(not b)
+        pass
 
     def clear_all_overlay_picks(self):
         for overlay in self.active_overlays: