Compatibility with title-bar-replacer package

[KevinTheGuo]

Hi! When I tried to use the nord-atom-ui theme with the title-bar-replacer package (https://atom.io/packages/title-bar-replacer), all the drop-down menus from the menu bar have a transparent background, which makes it very difficult to use

I was wondering if there was a simple fix to this- that would be great! Thanks.