Make the Push window bigger on Mac

The window for pushing to origin is too small. I have a 27" screen and yet, this popup is still 400x200. I always have to scroll or resize it.

Could we have it at a bigger size or a customizable size? I want to see all the branches at the same time, right when it appear.

Possible solution:

• Make it bigger by default
• Make it auto-resize base on the list length 
• Let us choose a size in settings