Enhance locking mechanism

This is a (subjectively) preferable behavior for locking the system.

- Pause all media players and mute audio when the system is locked. Unmute after unlocking.

.local/bin/sysact

@@ -13,8 +13,18 @@ wmpid(){ # This function is needed if there are multiple instances of the window
 	echo "${tree%%)*}"
 }
 
+lock(){
+    mpc pause
+    pauseallmpv
+    wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle
+    kill -44 $(pidof dwmblocks)
+    slock
+    wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle
+    kill -44 $(pidof dwmblocks)
+}
+
 case "$(printf "🔒 lock\n🚪 leave $WM\n♻️ renew $WM\n🐻 hibernate\n🔃 reboot\n🖥️shutdown\n💤 sleep\n📺 display off" | dmenu -i -p 'Action: ')" in
-	'🔒 lock') slock ;;
+	'🔒 lock') lock ;;
 	"🚪 leave $WM") kill -TERM "$(wmpid)" ;;
 	"♻️ renew $WM") kill -HUP "$(wmpid)" ;;
 	'🐻 hibernate') slock $ctl hibernate -i ;;