ApplicationListener defined in main view doesn't work after navigatin…

…g to another view #3222 (fix tests)

jmix-flowui/flowui/src/test/groovy/view_attributes/ViewAttributesTest.groovy

@@ -16,6 +16,7 @@
 
 package view_attributes
 
+import com.vaadin.flow.component.ComponentUtil
 import com.vaadin.flow.server.VaadinSession
 import io.jmix.flowui.view.StandardOutcome
 import io.jmix.flowui.view.ViewAttributes
@@ -54,6 +55,10 @@ class ViewAttributesTest extends FlowuiTestSpecification {
 
  and: "After closing View attribute should be removed from Vaadin session"
  view.close(StandardOutcome.CLOSE)
+ // All views, except detail view, remove view attribute on detach,
+ // so we need to trigger it explicitly, because on the time of assertion,
+ // DetachEvent hasn't fired yet.
+ ComponentUtil.onComponentDetach(view)
 
  def sessionAttrs1 = getAttributesFromSession(view.getId().get())
  sessionAttrs1 == null