placeholder: use identifier to look up human-readable names from ResourceBundle instead of if/elsing on classes

(e.g. `resourceBundle.getString(identifier() + ".name")`)

TODO @infeo

main/ui/src/main/java/org/cryptomator/ui/health/CheckListCell.java

@@ -26,7 +26,7 @@ class CheckListCell extends ListCell<HealthCheckTask> {
 		super.updateItem(item, empty);
 
 		if (item != null) {
-			setText(item.getTitle());
+			setText(item.getCheck().identifier()); // TODO lookup l18n key
 			item.stateProperty().addListener(this::stateChanged);
 			setGraphic(graphicForState(item.getState()));
 			stateIcon.setGlyph(glyphForState(item.getState()));