Attribute Selection Workflow must be changed

[MichaelMartin]

At the moment the user selects attribute properties to be used for filtering (similar to the measure property selection)

But units act otherwise.

Here it is necessary to select the referenced items such as units (cm, km, age, total, absolute, percentage, what ever ...)
But these items are mostly configured as object resources.

in my opinion, all Attribute properties should be listed in the selection box on the left (below each other) and a click on them (Change link) should lead to a dialogue wherin the user is able to select the referenced resources/literals