[UIXPRESS] Feature to set a global custom css file from a link

I understand that remote sync for the custom css styles is a bit more complex to build, but a very easy and quick solution, which would improve the whole workflow so much, would be a simple input field for a link to a custom css file. We could style so much faster and globally by simply working on one css file which is hosted on any ftp sever. We could work with any css editor we personally want, the changes would take effect immediately and every backend-styling of any of our websites using uiXpress changes consistently and at the exact same time. Fast, easy and globally. With only one single source. We just need this input field. ASAP :) Tanks a lot in advance! This would help so much!