Mobile fixes

[Giszmo]

Looks mostly good both in code and feature progress.

• [ ] Please make the mobile menu gone if the width is increased while open. Should be a simple css directive.
• [ ] The menu button looks odd, with some extra lines above and below:

Overall the design will need a lot more work to look less like svelte-kit hello-world and more like Twitter but this is a start.

[ralyodio]

@Giszmo I think we should focus on wireframing and hire a designer to reskin the app once we have it feature complete or are able to launch an MVP