(core) Document keeps track of latest cursor position and latest editor value and is able to restore them when it is reloaded.

Summary: Grist document, when reloaded, is able to restore the latest cursor position and the editor state.

Test Plan: Browser test were created.

Reviewers: dsagal

Reviewed By: dsagal

Subscribers: paulfitz

Differential Revision: https://phab.getgrist.com/D2808

app/client/declarations.d.ts

@@ -45,6 +45,11 @@ declare module "app/client/components/BaseView" {
   import {DomArg} from 'grainjs';
   import {IOpenController} from 'popweasel';
 
+  type Options = {
+    init? : string,
+    state? : any
+  }
+
   namespace BaseView {}
   class BaseView extends Disposable {
     public viewSection: ViewSectionRec;
@@ -63,6 +68,7 @@ declare module "app/client/components/BaseView" {
     public createFilterMenu(ctl: IOpenController, field: ViewFieldRec, onClose?: () => void): HTMLElement;
     public buildTitleControls(): DomArg;
     public getLoadingDonePromise(): Promise<void>;
+    public activateEditorAtCursor(options?: Options) : void;
     public onResize(): void;
     public prepareToPrint(onOff: boolean): void;
     public moveEditRowToCursor(): DataRowModel;