Navbar cleanup and enable mobile menu

[FeralAI]

This PR tightens up the navbar styling and spacing, and also enables the use of the collapsed nav for mobile when screen is less than 768px.

Summary of changes:

• Updated logo and made that the brand icon/area of the navbar, logo file slightly smaller now.
• Removed Home menu option and rolled that into the logo.
• Slightly reorganized the navbar actions (language, theme, etc.)
• Removed the inline styles on the navbar actions and used a parent container style for alignment
• Default the nav dropdowns to open toward the right to remain visible on smaller screens, since they're pinned to that side of the screen
• Removed the Danger Zone button. As much as I'm going to miss that remanant of the past, I think it caused more confusion than good. This has been rolled into the end of the Configuration menu
• Renamed a few button labels to reduce space taken: Nintendo Switch is now Switch, DirectInput is now DInput.

Here's a comparison of the extended menu view:

OLD:

NEW:

The old mobile view for the menu would make all the nav list items disappear:

This is fixed and the hamburger menu icon will now appear:

And here's a preview of the expanded mobile nav:

There are probably some minor things to address going forward, but those can be taken care when we address the responsiveness of the page content.

[arntsonl]

Nice clean changes and easy wins