The document `<title>` gives a name to a web document. In the context of the WordPress admin, a unique, meaningful, title is important for various reasons:
- it allows browser's history to store meaningful entries
- when multiple browser's tabs are open, it allows users to better identify the tab content
- it's the first thing screen readers announce when navigating to a web page, thus helping users to identify the nature of the page content
Props chetan200891, mukesh27.
Fixes#46699.
git-svn-id: https://develop.svn.wordpress.org/trunk@45070 602fd350-edb4-49c9-b593-d223f7449a82