Implement global notification for configurations update of gradle scripts

For 193: it will be a simple notification at the bottom of the IDEA window
For 201: a floating notification in the editor is implemented near "Load Gradle Changes" icon
^KT-34443 Fixed

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

@@ -58,9 +58,8 @@ class DefaultScriptConfigurationNotificationFactory : ScriptConfigurationNotific
         withSelectedEditor(project) { manager ->
             val existingPanel = notificationPanel
             if (existingPanel != null) {
-                notificationPanel?.let {
-                    manager.removeTopComponent(this, it)
-                }
+                existingPanel.onClick = onClick
+                return@withSelectedEditor
             }
 
             val panel = NewLoadConfigurationNotificationPanel(onClick, project)
@@ -84,7 +83,7 @@ class DefaultScriptConfigurationNotificationFactory : ScriptConfigurationNotific
             by UserDataProperty<FileEditor, NewLoadConfigurationNotificationPanel>(Key.create("load.script.configuration.panel"))
 
     private class NewLoadConfigurationNotificationPanel(
-        val onClick: () -> Unit,
+        var onClick: () -> Unit,
         project: Project
     ) : EditorNotificationPanel() {
 

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/configuration/DefaultScriptConfigurationManager.kt

@@ -191,17 +191,16 @@ internal class DefaultScriptConfigurationManager(project: Project) :
                 if (postponeLoading) {
                     ScriptConfigurationNotificationFactory.NOTIFICATION_FACTORY.getPoint(project).extensionList.firstOrNull {
                         it.showNotification(virtualFile, project) {
-                            runAsyncLoaders(file, virtualFile, scriptDefinition, async, postponeLoading)
+                            runAsyncLoaders(file, virtualFile, scriptDefinition, async, isLoadingPostponed = true)
                         }
                     }
                 } else {
-                    runAsyncLoaders(file, virtualFile, scriptDefinition, async, postponeLoading)
+                    runAsyncLoaders(file, virtualFile, scriptDefinition, async, isLoadingPostponed = false)
                 }
             }
         }
     }
 
-    //  в нотификации остается старый колбек - нужно перезаписывать колбек
     private fun runAsyncLoaders(
         file: KtFile,
         virtualFile: VirtualFile,