(core) Fix more tests: bundleSize and Embed

Summary:
1. Unclear why Embed fails often. Locally, it fails for me every time, and
   this tweak makes it pass (while still keeping the test useful).
2. Reduced back main bundle's size by removing dependency of some common
   elements on the full AdminPanel. Updated expected size of errorPages
   bundle to the new reduced size.

Test Plan: No changes to functionality; relying on existing tests to verify that.

Reviewers: jordigh

Reviewed By: jordigh

Subscribers: georgegevoian, jordigh

Differential Revision: https://phab.getgrist.com/D4315

app/client/ui/AccountWidget.ts

@@ -1,7 +1,7 @@
 import {AppModel} from 'app/client/models/AppModel';
 import {DocPageModel} from 'app/client/models/DocPageModel';
 import {getLoginOrSignupUrl, getLoginUrl, getLogoutUrl, getSignupUrl, urlState} from 'app/client/models/gristUrlState';
-import {getAdminPanelName} from 'app/client/ui/AdminPanel';
+import {getAdminPanelName} from 'app/client/ui/AdminPanelName';
 import {manageTeamUsers} from 'app/client/ui/OpenUserManager';
 import {createUserImage} from 'app/client/ui/UserImage';
 import * as viewport from 'app/client/ui/viewport';

app/client/ui/AdminPanel.ts

@@ -25,14 +25,10 @@ import * as version from 'app/common/version';
 import {Computed, Disposable, dom, IDisposable,
         IDisposableOwner, MultiHolder, Observable, styled} from 'grainjs';
 import {AdminSection, AdminSectionItem, HidableToggle} from 'app/client/ui/AdminPanelCss';
+import {getAdminPanelName} from 'app/client/ui/AdminPanelName';
 
 const t = makeT('AdminPanel');
 
-// Translated "Admin Panel" name, made available to other modules.
-export function getAdminPanelName() {
-  return t("Admin Panel");
-}
-
 export class AdminPanel extends Disposable {
   private _supportGrist = SupportGristPage.create(this, this._appModel);
   private _toggleEnterprise = ToggleEnterpriseWidget.create(this);

app/client/ui/AdminPanelName.ts

@@ -0,0 +1,11 @@
+// Separated out into its own file because this is used in several modules, but we'd like to avoid
+// pulling in the full AdminPanel into their bundle.
+
+import {makeT} from 'app/client/lib/localization';
+
+const t = makeT('AdminPanel');
+
+// Translated "Admin Panel" name, made available to other modules.
+export function getAdminPanelName() {
+  return t("Admin Panel");
+}

app/client/ui/HomeLeftPane.ts

@@ -5,7 +5,7 @@ import {reportError} from 'app/client/models/AppModel';
 import {docUrl, urlState} from 'app/client/models/gristUrlState';
 import {HomeModel} from 'app/client/models/HomeModel';
 import {getWorkspaceInfo, workspaceName} from 'app/client/models/WorkspaceInfo';
-import {getAdminPanelName} from 'app/client/ui/AdminPanel';
+import {getAdminPanelName} from 'app/client/ui/AdminPanelName';
 import {addNewButton, cssAddNewButton} from 'app/client/ui/AddNewButton';
 import {docImport, importFromPlugin} from 'app/client/ui/HomeImports';
 import {