Add a toggle for the old ui

Thank you for your report!
After consideration, the issue is being closed as Invalid.

You have posted a feature request or a suggestion. This site is for bug reports only.
For suggestions, please visit The official Minecraft feedback site or visit the Minecraft Feedback Discord server.

Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki