Press ESC in the search text box -> close it

[rubnogueira]

If we have the focus on the search textbox and we press ESC, the textbox dialog should close. Currently we need to press twice, one time to lose the focus, the second one to close it.

Both iTerm and Apple Terminal close with just 1 press, and I'm struggling a little with my muscle memory. :)

[joeshaw]

I mentioned this in my macOS behaviors post but I am coming around to this behavior. I appreciate that it makes it easy to return focus to the terminal without losing all my existing matches. Without this you have to click back into the terminal to do it.