Thank you for your response. I'm a little confused though. Setting auto-width worked with M1 (unless I'm just completely remembering incorrectly). So, are you saying that for M2 autoWidth isn't working but it will with the GA release or autoWidth is not to be supported anymore.
If you are not supporting autoWidth anymore, can I ask why? This is a huge feature of the grid when allowing for a dynamically-sized window. Thank you.