FIX : Admin custom CSS area forces entire page to scroll #2886 (#2892)

* Update EditPageContent.tsx

Adding Scroll to codemirror

* Prettified Code!

* Fixing CSS- code mirror scroll issue

Removing excess code
and fixing CSS code mirror

* Prettified Code!

* Prettified Code!

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Co-authored-by: dev265545 <dev265545@users.noreply.github.com>
Co-authored-by: Gabe Kangas <gabek@real-ity.com>
Co-authored-by: gabek <gabek@users.noreply.github.com>

README.md

@@ -74,6 +74,7 @@ In general, Owncast is compatible with any software that uses `RTMP` to broadcas
 OBS, Streamlabs, Restream and many others have been used with Owncast. [Read more about compatibility with existing software](https://owncast.online/docs/broadcasting/).
 
 ## Building from Source
+
 Owncast consists of two projects.
 
 1. The Owncast backend is written in Go.
@@ -108,7 +109,6 @@ The frontend is the web interface that includes the player, chat, embed componen
 1. Run `npm install` to install the Javascript dependencies.
 1. Run `npm run dev`
 
-
 ## Contributing
 
 Owncast is a growing open source project that is giving freedom, flexibility and fun to live streamers.