KotlinScriptConfigurationManager#notifyRootsChanges: run synchronously in tests

Allows to unmute some of the ScriptConfigurationNavigation tests

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/KotlinScriptConfigurationManager.kt

@@ -95,8 +95,7 @@ class KotlinScriptConfigurationManager(
     }
 
     private fun notifyRootsChanged() {
-        // TODO: it seems invokeLater leads to inconsistent behaviour (at least in tests)
-        ApplicationManager.getApplication().invokeLater {
+        val rootsChangesRunnable = {
             runWriteAction {
                 if (project.isDisposed) return@runWriteAction
 
@@ -106,6 +105,14 @@ class KotlinScriptConfigurationManager(
                 }
             }
         }
+
+        val application = ApplicationManager.getApplication()
+        if (application.isUnitTestMode) {
+            rootsChangesRunnable.invoke()
+        }
+        else {
+            application.invokeLater(rootsChangesRunnable)
+        }
     }
 
     fun getScriptClasspath(file: VirtualFile): List<VirtualFile> = toVfsRoots(