Missing Controls in the Incident Thread Toolbar on the Browser UI

Summary

The "Increase Indent" and "Decrease indent" buttons/controls are missing from the Incident Thread Toolbar of the agent browser UI

Content

The "Increase Indent" and "Decrease indent" controls are missing from the Incident Thread Toolbar (WYSIWYG Toolbar) in the incident workspace of the agent browser UI.
This, while other rich text controls are available (in the note and response).
Also, the keyboard's "Tab" key cannot be used to indent the text since, in the BUI, it's purpose is only in navigation (to shift focus):
Keyboard Navigation on the Agent Browser UI

Is there a way to add these two controls to the incident thread toolbar?