Pull Request for Issue #46149 .

Summary of Changes

Added JPAGETITLE language constant to the backend language file.

Testing Instructions

This requires a bit of code changing to test.

First make sure you set this global configuration setting:

• Site Tab -> Site Name in Page Titles -> to before or after

Then go to this file:

• administrator/components/com_banners/src/View/Banners/HtmlView.php
  around line 522 add this code:

        $this->setDocumentTitle("TEST PAGE TITLE");

after

        $this->addToolbar();

Now go to this url:
yourdomain.com/administrator/index.php?option=com_banners&view=banners

Or open banners view in your administrator backend.

Actual result BEFORE applying this Pull Request

• Page title shows JPAGETITLE

Expected result AFTER applying this Pull Request

• Page title shows "TEST PAGE TITLE" or other name you used in $this->setDocumentTitle("TEST PAGE TITLE");

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• [x ] No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• [x ] No documentation changes for manual.joomla.org needed