Fix hamburger menu on mobile

[7heMech]

Closes #4831 I've tested and can confirm this PR resolves the issue.

[nginxproxymanagerci[bot]]

Docker Image for build 1 is available on DockerHub:

nginxproxymanager/nginx-proxy-manager-dev:pr-4859

[!NOTE] Ensure you backup your NPM instance before testing this image! Especially if there are database changes. This is a different docker image namespace than the official image.

[!WARNING] Changes and additions to DNS Providers require verification by at least 2 members of the community!

[iecxiv]

I can confirm the fix works

[sopex]

@jc21 This would be great for emergencies, to be able to use a phone.

[JohnathonMohr]

I almost exclusively use my phone, so I'm holding off updating until this is merged in. I'm just glad I reviewed the open issues before pulling the latest image. 😅