PICARD-3234: Fix columns being restored with 0 width

When loading the stored columns setting invisible columns would be set
to a width of 0. This would call issues with columns not being shown
after enabling them.

Set the width to the default column width if it would be 0.

Author: phw

picard/ui/widgets/configurablecolumnsheader.py

@@ -348,7 +348,7 @@ def restore_columns_state(self, state: dict[str, dict]):
                 QtWidgets.QHeaderView.ResizeMode.Fixed.value,
                 QtWidgets.QHeaderView.ResizeMode.Interactive.value,
             }:
-                self.resizeSection(i, column_state.get('width', column.width or 100))
+                self.resizeSection(i, column_state.get('width', 0) or column.width or 100)
 
             # Sort indicator uses logical index, independent of visual positioning
             if 'sorted' in column_state: