Gnats 4540: Config Slot Convergence: Absolute Convergence Type should show Units.
Gnats Record Link

The Absolute Convergence Type is specified as a numeric value in Internal Units (for the Slot's unit type). The presentation of this value to the user in the Configure Slot dialog box is particularly misleading because the convergence value is presented at the same time as the User (Display) Units settings. When the Absolute Convergence Type is selected, the internal units should be indicated in a label to the right of the Convergence Value edit/display (QLineEdit) widget.

Convergence Type menu:

Enhanced for this bug:

Details: