(core) Polish Access Details

Summary:
Instead of showing a blank dialog for users whose access
is limited (e.g. public members), we now show the user's
role and a mention of whether their access is public.

Test Plan: Browser tests.

Reviewers: paulfitz

Reviewed By: paulfitz

Differential Revision: https://phab.getgrist.com/D3431

app/client/ui/ShareMenu.ts

@@ -242,7 +242,7 @@ async function manageUsers(doc: DocInfo, docPageModel: DocPageModel) {
   const user = appModel.currentValidUser;
   (await loadUserManager()).showUserManagerModal(api, {
     permissionData: api.getDocAccess(doc.id),
-    activeEmail: user ? user.email : null,
+    activeUser: user,
     resourceType: 'document',
     resourceId: doc.id,
     resource: doc,