Switching from "content" to "styles" tab has major jumps in movement

Problem/Motivation

Interacting with ME modal is a bit frustrating. Going from a "content" tab to "style" tab moves the tabs significantly which can be a major issue for those with mobility impairments, low vision, and cognitive impairments.

Screencast: https://share.cleanshot.com/z3ch74zk

Proposed resolution

Create a max and min width for these modals so there is no jumping, around and tabs stay in a static placement