Different UI on different computers

[Yonaz]

So, I have 2 computers. 1 laptop and one workstation I play from. The workstation has a 27" screen, and the laptop a 15" that I use for traveling. My question is divided into 2 different:

1. Are my ingame-UI stored locally, or on Blizzards servers? If I move a actionbar on one computer, will it be moved on the other too? Reason I ask is, that when I log into my laptop, my unitframes are misplacers, since they are based on the 27"..can I move them on the laptop without them being moved on the workstation?

2. Addons on twitch app, is there a way to login to the twitch app on my laptop, and it automatically download and/or updates the ones I use on my workstation?