BUG: Placeholders for empty values have different colors in entity tables

[tillprochaska]

Describe the bug This isn’t important, but I’m a little bit pedantic about visual details like this: In entity tables, the "–" placeholder for empty values has a different color in the last row (the dummy row that’s appended so you can create new entities).

To Reproduce Steps to reproduce the behavior:

1. Create an invesetigation.
2. Navigate to the table editor for "Person" entities.
3. Create a new entity and enter only a name. Leave the other columns empty.

Expected behavior The "–" placeholder in the dummy row should be muted/grayed out.

Screenshots

Additional context -/-