(core) Add behavioral and coaching call popups

Summary:
Adds a new category of popups that are shown dynamically when
certain parts of the UI are first rendered, and a free coaching
call popup that's shown to users on their site home page.

Test Plan: Browser tests.

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3706

app/client/aclui/AccessRules.ts

@@ -322,6 +322,9 @@ export class AccessRules extends Disposable {
 
   public buildDom() {
     return cssOuter(
+      dom('div', this._gristDoc.behavioralPrompts.attachTip('accessRules', {
+        hideArrow: true,
+      })),
       cssAddTableRow(
         bigBasicButton({disabled: true}, dom.hide(this._savingEnabled),
           dom.text((use) => {