Add option to change the default keybind to open the command line

[iamhrigved]

Problem

Esc and Ctrl+Shift-P are the default keybinds to open the command line. I use a browser extension called Vimium, which requires me to be in Normal Mode (any input field not activated) to work properly.

Since when in a test, insert mode (input field active) is activated, when I try to go to back to Normal Mode, pressing Esc opens the command line.

I want to change the default behavior of the Esc key.