First thing I tried to do and also wasn't able.
I'm so used to force move on ' that I was legit shocked that I couldn't LOL.

I usually bind force attack there too. How does anyone press 1 to 5 and hold left shift to not move?

Not sure if this helps but if you double click the Forced Attack key binding it'll allow you to change the key. I currently have mine to mouse5 and can cast without moving towards the target. I can't see an option to bind 2 different key options like you can in D3.