Change g s / and g s SPC

The former searches the current window/buffer, the latter searches all
windows in the frame.

Removes g s ? (deemed not as useful as avy-goto-char-timer)

modules/config/default/config.el

@@ -18,6 +18,7 @@
 
 ;;;###package avy
 (setq avy-all-windows nil
+      avy-all-windows-alt t
       avy-background t)