Autclose navbar on small screens

[Bi1ku]

Autoclose the dropdown navbar on small screens for better a better user experience

Old vs. new:

Screen.Recording.2024-10-28.at.8.07.25.PM.mov

[achoi51]

Hey @Bi1ku, thanks for the PR!
Just for future reference, try to keep the formatting of the code (whitespace, indents, etc.) close to the original (makes it easier to review the PR + good practice anyways).

As a reminder, make sure to sync up your fork with the main repo (git pull --rebase upstream main)