modalityLevel: non-modal

WARN  agnolia.config.source.yaml.YamlConfigurationSource: 1 major and 0 minor problems have been encountered

65     /**
 66      * The available levels of modality.
 67      * Determines how "modal" it is -
 68      * -STRONG creates a dark background that prevents clicks.
 69      * -LIGHT adds a border, creates a transparent background that prevents clicks.
 70      * -NON_MODAL does not prevent clicks.
 71      */
 72     public static enum ModalityLevel {
 73         STRONG("strong", "modality-strong"),
 74         LIGHT("light", "modality-light center-vertical"),
 75         NON_MODAL("non-modal", "modality-non-modal");

info.magnolia.ui.framework.overlay.OverlayPresenter
216         final OverlayCloser closer = openOverlay(new ViewAdapter(shortcutPanel), ModalityLevel.NON_MODAL);
And it's used here:
info.magnolia.dam.app.assets.field.UploadAssetActionRenderer
155                 progressIndicatorCloseHandle = layer.openOverlay(new ViewAdapter(progressIndicator), ModalityLevel.NON_MODAL);

assertEquals("light", session.getProperty("/modules/ui-framework/dialogs/rename/modalityLevel").getString());
and
assertEquals("strong", session.getProperty("/modules/pages/dialogs/createPage/modalityLevel").getString());

---
modalityLevels: strong
modalityLeveln: non-modal
modalityLevell: light