[Bug]: In Kanban view, empty columns not shown for custom properties

[tommygents]

Bug Description

Kanban view does not show a column for empty values of the 'Sort' property when that property is a custom property. That is, it acts as if the "Hide Empty Columns" toggle is on, even when it is not.

I'd expect TaskNotes to get a list of values for that property from across the vault and make columns for those.

[tommygents]

Sorry, closing this as a duplicate of #1446