Please support tripple escape

[msrd0]

In emacs, pressing the Esc key three times in a row quits from the current command and returns to the buffer. Say I pressed C-S and want to return from the search field to the main buffer, I can press escape three times to stop the search and get back to the main buffer.

Unfortunately, this extension does not allow quitting from the search mask with the escape key at all when it's being used as the meta key. I'm fine with escape not returning immediately from the search mask, but pressing it three times in a row should.

[whitphx]

Ref: https://www.gnu.org/software/emacs/manual/html_node/emacs/Quitting.html