[3.15] community/sxmo-utils: upgrade to 1.6.1

Backports a few fixes from the upcoming 1.7 release, which we'd like for the upcoming postmarketOS v21.12 release:

• Allow 'escp' to cancel notifmenu
• Fix height / width of dmenu in dwm so it doesnt overlap with numbers on keyboard
• unset mpv default bindings for volume keys
• Added a more subtle keytap audio clip for clickclack (opt-in)
• Move modem stuff to can_suspend
• fixed doas order
• let users use doas like they use sudo (ask for pw), needed for sxmo_upgrade.sh and elsewhere
• Suspend should off then crust, not lock then crust.
• Move active ssh into the can_suspend hooks
• Ensure we reset the sway mode on script crashes