Advanced settings GUI

The GUI for managing lists of white-/blacklisted INSTCODEs is not intuitive:

User has to hit Enter key to add an item, it is not clear what the "Save" button does and removing of items is using a web-like UI.

Changes

The section "Selected Institute codes" should have: A label "New entry", followed by text field, followed by "Add to list" button.

Use the standard List box with multi-select enabled. Add "Remove" button (enabled if there is anything selected).

Remove "Save" button.