Only open the hotkey window by default

• iTerm2 version: Latest nightly
• OS version: Sierra 10.12.5

What happened:
I've set my default profile as a hotkey window. Now, when I open iTerm, it opens up a regular window. Pressing the hotkey shows the hotkey window (2 windows).

What should have happened:
I wonder if there's an option to only open the hotkey window by default? My intention is to use it as guake.

P.S. This 3.1 nightly build is perfect! Thanks 🙏