Please implement asset saving for assets imported with ScriptedImporter

ScriptedImporter API is great for custom asset importing. But if you have an asset that you can edit directly in the Unity Editor (with a custom editor), there's no way (at least non hacky way) to save the changes back. So please, either expand the API and add ability to save modified assets; or expose EditorUtility.IsDirty() and add another method to clear the dirty flag, so it would be possible to achieve this manually.