Admin page title is a placeholder

**Description**
The page title shows a "App by Company" placeholder in the admin view


**To Reproduce**
Steps to reproduce the behavior:

1. Go to admin view
1. See the page title in the browser tab

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Hardware**

* Device: Desktop
* OS: Win 10
* Browser: Chrome

**Additional context**
The page title shows the configured app name and company name.

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/HUBS-1041)

Start by reproducing the admin view in Chrome and inspect where the browser-tab title is set and where the configured app and company names are available. Done means the admin page title shows the configured app name and company name instead of the “App by Company” placeholder.

Written by the indexing model from the issue text.