Make sure we handle detectors with missing filters

Signed-off-by: Brianna Major <brianna.major@kitware.com>

Author: bnmajor

hexrdgui/absorption_correction_options_dialog.py

@@ -11,14 +11,19 @@ def __init__(self, parent=None):
                                    parent)
 
         self.additional_materials = {}
-        self.filters = {
-            det: {
-                'material': HexrdConfig().detector_filter(det).material,
-                'density': HexrdConfig().detector_filter(det).density,
-                'thickness': HexrdConfig().detector_filter(det).thickness
+        # Get filter defaults for each detector
+        self.filters = {}
+        for det in HexrdConfig().detector_names:
+            filter = HexrdConfig().detector_filter(det)
+            if filter is None:
+                HexrdConfig().update_detector_filter(det)
+                filter = HexrdConfig().detector_filter(det)
+
+            self.filters[det] = {
+                'material': filter.material,
+                'density': filter.density,
+                'thickness': filter.thickness
             }
-            for det in HexrdConfig().detector_names
-        }
         self.mat_options = []
 
         self.load_additional_materials()