Theme options tab markup will need an update for WordPress 5.2

[greatislander]

Prerequisites

• Can you reproduce the behavior you wish to address with all other plugins deactivated?
• Are you running the latest version of Pressbooks and the latest version of WordPress?
• Are you experiencing this issue with one of our built-in root or book themes?
• Did you perform a cursory search to see if your bug or enhancement is already listed?

Description

WordPress 5.2 will introduce semantic improvements for the markup of admin tabs such as those found on the Theme Options page in Pressbooks. Whenever Pressbooks is updated for 5.2 compatibility, it should track these changes.

Steps to Reproduce

Not applicable.

System Information

Pressbooks: 5.7.0