finish fixing folder names when lots of slashes exist; closes pterodactyl#2377

Author: DaneEveritt

resources/scripts/components/server/files/NewDirectoryButton.tsx

@@ -24,7 +24,7 @@ const schema = object().shape({
 
 const generateDirectoryData = (name: string): FileObject => ({
     key: `dir_${name.split('/', 1)[0] ?? name}`,
-    name: name.split('/', 1)[0] ?? name,
+    name: name.replace(/^(\/*)/, '').split('/', 1)[0] ?? name,
     mode: '0644',
     size: 0,
     isFile: false,