message: Added missing property for the FormApplication Editor interface.
  Updated the mce property for the FormApplication Editor interface, it can be null or.
  Changed the name of the Editor interface under FormApplication as this was getting confused with the global tinyMCE Editor.
diff: @@ -45,7 +45,7 @@ declare abstract class FormApplication<
  * The values of this Array are inner-objects with references to the MCE editor and other metadata
  * @defaultValue `{}`
  */
  - editors: Partial<Record<string, FormApplication.Editor>>;
  + editors: Partial<Record<string, FormApplication.FormApplicationEditor>>;
  /**
  * Assign the default options which are supported by the entity edit sheet.
  @@ -211,13 +211,14 @@ declare namespace FormApplication {
  title: string;
  }
  - interface Editor {
  + interface FormApplicationEditor {
  + active: boolean;
  activate: boolean;
  button: HTMLElement;
  changed: boolean;
  hasButton: boolean;
  initial: string;
  - mce: Editor;
  + mce: Editor | null;
  options: TextEditor.Options;
  target: string;
  }
  