Disable Ctrl-/ Chrome shortcut on Linux

gtk.css

/* Copyright 2020 Google LLC.
 * SPDX-License-Identifier: Apache-2.0
 * 
 * Asana wants to use Ctrl-/ (control-slash) to activate most of its
 * keyboard shortcuts.  Unfortunately, this conflicts with a default that
 * is part of GTK, an alias for select all (Ctrl-a).  This is how to
 * unset the Ctrl-/ keyboard shortcut for all GTK apps, which crucially
 * includes Chrome on Linux.
 */

@binding-set MyUnbindings
{
  unbind "<ctrl>slash";
}
 
* {
  -gtk-key-bindings: MyUnbindings
}