Fix the NavBar Overflow Issue when NavBar Items are Too Many

[leimao]

@ppoffice Feel free to merge it.

[ppoffice]

Can you make the brand logo fixed and not scroll with rest of the navbar?

Never mind. Still it is not advised to have too many menu items.

[leimao]

Can you make the brand logo fixed and not scroll with rest of the navbar?

Thank you. Let me check if I can make it.

[leimao]

@ppoffice I checked the source code. The problem was the container class overflowed. So as long as the logo is in the container and we make the container to have overflow-x: auto, the logo will always scroll with the other items.
Unless, we can make sure the container class will never overflow. Otherwise, it is difficult to achieve your goal.