Feature request: Be able to have multi window open

It would be nice if you are able to have multiple assets open at the same time, since sometimes you may need it.

There are to options here:

1. Having multiple windows open in the same instance of editor. Kind of just splitting the editor window.
2. Having a new instance of editor opened from terminal. In this case there might be complications with the log info shown in the terminal. The question is are they useful for user or not?