This mode of application controls uses radio button choices to let the user select a single value.
In application Edit mode, hover over a filter that is already added to the application, until the controls appear on the top right.
Click the icon (gear).
The Settings modal window appears.
In the Settings modal window, under Display Settings tab, select the options Permit only one item to be selected and, optionally, In single select mode, include a 'No Selection' option. Ensure that no other options are selected.
Click Apply.
In the state filter, click Select.
The application control expands, in single value mode.