The "Script" column in the Property Editor is also selected, when a "..." button is pressed in the "Value" column.
For example, to reproduce the issue:
1. Open the Workflow Designer.
2. Enable the scripting mode (select "Actions > Scripting mode > Show scripting options").
3. Drag the "Read from remote database" element to the Scene.
4. Press the "..." button of the "Resource IDs" parameter.
5. Close the appeared dialog.
!=> The "Scirpt" column is also selected.