Issue #3427563: Create NavigationBlockUiTest class

src/Attribute/NavigationBlock.php

src/Controller/NavigationBlockLibraryController.php

src/Form/NavigationBlockForm.php

src/NavigationBlockListBuilder.php

src/Plugin/NavigationBlock/Broken.php

.../navigation_test/config/schema/navigation_test.schema.yml

tests/modules/navigation_test/navigation_test.info.yml

tests/modules/navigation_test/navigation_test.module

tests/modules/navigation_test/navigation_test.services.yml

...gation_test/src/ContextProvider/MultipleStaticContext.php

...t/src/Plugin/NavigationBlock/TestCacheNavigationBlock.php

...lugin/NavigationBlock/TestContextAwareNavigationBlock.php

...ationBlock/TestContextAwareNoValidContextOptionsBlock.php

...ationBlock/TestContextAwareUnsatisfiedNavigationBlock.php

...ugin/NavigationBlock/TestNavigationBlockInstantiation.php

...rc/Plugin/NavigationBlock/TestSettingsValidationBlock.php

...rc/Plugin/NavigationBlock/TestXSSTitleNavigationBlock.php

tests/src/Functional/NavigationBlockCacheTest.php

tests/src/Functional/NavigationBlockUiTest.php

tests/src/Functional/NavigationBlockXssTest.php