Inconsistent behavior within the Attributes pane when bulk editing Attributes to 'Null'.

Workaround

1. Select a different drop-down value and then select '<Null>' again. Click Apply, and the two record attributes are updated appropriately.
2. When updating a non-domain numeric field to '<Null>', press Backspace to clear the value in the pane, and press Tab or Enter. The value now shows as '<Null>' in the Attributes pane window.

Steps to Reproduce