(core) Filter out pages for hidden views from the page list.

Summary:
- Filters out hidden pages from docModel.allPagesList (used for knowing default page, and for search iteration).
- Filters out hidden pages from TreeModel (uses raw tableData, so has a different way to filter).

Test Plan: WIP

Reviewers: georgegevoian

Reviewed By: georgegevoian

Differential Revision: https://phab.getgrist.com/D2996

app/client/models/entities/DocInfoRec.ts

@@ -18,7 +18,7 @@ export function createDocInfoRec(this: DocInfoRec, docModel: DocModel): void {
     return tab ? tab.viewRef() : 0;
   }));
   this.newDefaultViewId = this.autoDispose(ko.pureComputed(() => {
-    const page = docModel.allDocPages.at(0);
+    const page = docModel.visibleDocPages()[0];
     return page ? page.viewRef() : 0;
   }));
 }

app/client/models/entities/PageRec.ts

@@ -4,8 +4,13 @@ import * as ko from 'knockout';
 // Represents a page entry in the tree of pages.
 export interface PageRec extends IRowModel<"_grist_Pages"> {
   view: ko.Computed<ViewRec>;
+  isHidden: ko.Computed<boolean>;
 }
 
 export function createPageRec(this: PageRec, docModel: DocModel): void {
   this.view = refRecord(docModel.views, this.viewRef);
+  this.isHidden = ko.pureComputed(() => {
+    const name = this.view().name();
+    return !name || (name === 'GristDocTour' && !docModel.showDocTourTable);
+  });
 }