Show Header Button on Mobile View (to the right) and Hamburger menu (to the left)

Hi, looking for a code to "Show Header Button on Mobile View (to the right) and Hamburger menu (to the left)".

Also anyway to shorten the hamburger menu in mobile. Theres a lot of white space I don't need. 

Thanks in advance!

If you share site url, we can check easier.

You can also adjust a bit from this thread