Filter field: required validation not being for the first time

[sebapawlak]

Bug Report

For the filter field component Validators.required validation is not being triggered when a filter is selected and no value for the filter is provided. Likely caused by fix for #1180

When some value is typed and then deleted then it gets properly validated and a validation error is shown.

Expected Behavior

When there is a validation that requires value and after the selection of the filter it gets submitted there should be a validation error.

Current Behavior

There is no validation error shown if the page is submitted right after a filter with Validators.required validation is selected.

Steps to Reproduce

Data source to reproduce the issue:

{
    autocomplete: [
      {
        name: 'nonEmptyFreeText',
        suggestions: [],
        validators: [
            {validatorFn: (control: FormControl) => Validators.required(control), error: 'Content cannot be empty.'},
          ],
      },
    ],
}

1. Select nonEmptyFreeText filter.
2. Hit return key.
3. Validation error should be shown at this point.

Used Versions:

Issue does not exist in Barista 7.2.0.
Issue identified in Bartista 7.4.0 but 7.3.0 was not checked.

[tomheller]

@sebapawlak Thank you for reporting this. I can confirm that this is an issue caused by the fix contained in #1180.