Merge pull request #1976 from HEXRD/allow-region-mask-none

Allow region mask to have name of `None`

Author: psavery

hexrdgui/masking/mask_manager.py

@@ -130,7 +130,7 @@ def deserialize(cls, data: dict[str, Any]) -> 'Mask':
 class RegionMask(Mask):
     def __init__(
         self,
-        name: str = '',
+        name: str | None = None,
         mtype: str = '',
         visible: bool = True,
         show_border: bool = False,
@@ -422,7 +422,7 @@ def add_mask(
             new_mask = ThresholdMask(name, mtype, visible)
         else:
             mode = None if mtype == MaskType.pinhole else self.view_mode
-            new_mask = RegionMask(name or '', mtype, visible, mode=mode)
+            new_mask = RegionMask(name, mtype, visible, mode=mode)
         new_mask.data = data
         assert new_mask.name is not None
         self.masks[new_mask.name] = new_mask