[IFT] Fix unexpected restores in the navigation lessons

File is opened asynchronously, but restore check is executed after any event. There is no way except of adding the delay for restore.
Fixed IFT-475, IFT-476 and IFT-477.

GitOrigin-RevId: 4090bb9db067135a791a0a72c2f434060bc108eb

java/java-features-trainer/src/com/intellij/java/ift/lesson/navigation/JavaInheritanceHierarchyLesson.kt

@@ -37,7 +37,7 @@ class JavaInheritanceHierarchyLesson
         (virtualFile.name == "DerivedClass1.java" || virtualFile.name == "DerivedClass2.java") && atDeclarationPosition()
       }
 
-      restoreAfterStateBecomeFalse {
+      restoreState(delayMillis = defaultRestoreDelay) {
         focusOwner is EditorComponentImpl
       }