Resolve "Add tooltip to sidebar title menu item"

What does this MR do and why?

A tiny MVC for: #333346 (closed) to add a tooltip for the sidebar title menu item.

• Groups
• Projects
• Admin
• Security
• User Settings

Screenshots or screen recordings

R1

How to set up and validate locally

1. Navigate to a project, a group, admin section, security section or user settings
2. Hover over the sidebar title to see a tooltip

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #333346 (closed)