Move dropdown inline with header bottom

I have moved the dropdown of my site to the bottom o fthe header as I wanted.

But whenever I tried to click on the dropdown, it disappear as the mouse hover the folder title.

I will appreciate if you could help me with the code to make it stay  while you check the website.

Here's the type of menu that I want to achieve: "https://mypieceofcakemove.com/storage/"

I guess you need to adjust height of nav item = height of header, to prevent this

What is your site url? We can check easier