fix(nixos): Improve key bindings in X11 applications

I don't actually use all that many emacs navication keys in X11
applications - but being able to copy & paste is nice.

Overrides the default set of input simulation keys for EXWM with
slightly fewer and more sane bindings.

init/nixos.el

@@ -43,16 +43,8 @@
 
       ;; Line-editing shortcuts
       (exwm-input-set-simulation-keys
-       '(([?\C-b] . left)
-         ([?\C-f] . right)
-         ([?\C-p] . up)
-         ([?\C-n] . down)
-         ([?\C-a] . home)
-         ([?\C-e] . end)
-         ([?\M-v] . prior)
-         ([?\C-v] . next)
-         ([?\C-d] . delete)
-         ([?\C-k] . (S-end delete))))
+       '(([?\C-d] . delete)
+         ([?\C-w] . ?\C-c)))
 
       ;; Enable EXWM
       (exwm-enable)