Add live Markdown editing, colours and files in the tree

Frontend/src/App.jsx

@@ -387,6 +387,7 @@ export default function App() {
               ShowGitBlame={Settings ? Settings.ShowGitBlame : false}
               ShowBlameAvatars={Settings ? Settings.ShowBlameAvatars : false}
               StickyToolbar={Settings ? Settings.StickyToolbar : true}
+              MarkdownEditing={Settings ? Settings.MarkdownEditing : "Live"}
               IsGuest={IsGuest}
             />
           )}