Steps to reproduce:

scenario 1 (generic popup that adds selected value in a table):

1. Open trigger edit form.
2. Add a dependent trigger.
3. Press ''Add'' to open the dependent trigger form again.
4. Observe: Selected value is not marked in any way.

Expected: Selected value is marked as disabled. 

scenario 2 (pattern-select fields):

1. Navigate to Dashboards
2. Add new widget -> select Pie chart
3. In configuration form add a value in item pattern field
4. Open the pattern select again - selected value is not marked.

Expected: All items matching selected pattern are disabled.

Note - both scenarios can be reproduced in multiple forms across UI.