scripts: Add unified volume bars to control scripts

`control-brightness` and `control-volume` both now have the exact same
progress bar indicator.
Additionally, by using the same dunst 'stack' they replace each other if
invoked in quick succession, which I really like.

scripts/.local/bin/control-brightness

@@ -23,13 +23,15 @@ send_notification() {
   brightness=$(get_brightness)
   # Make the bar with the special character ─ (it's not dash -)
   # https://en.wikipedia.org/wiki/Box-drawing_character
-  bar=$(seq -s "─" 0 $((brightness / 5)) | sed 's/[0-9]//g' |
-    sed -e 's/^─/┠/' -e 's/^\(.\{20\}\)/\1┫/')
+  bar=$(seq -s "─" $((brightness / 5)) | sed 's/[0-9]//g')
   if type dunstify 1>/dev/null 2>/dev/null; then
-    dunstify -i "$icon" -u normal "    $bar" -a "xbacklight" -h string:x-dunst-stack-tag:brightness
+    notcmd="dunstify -h string:x-dunst-stack-tag:brightness"
   else
-    notify-send -i "$icon" -u normal "    $bar" -a "xbacklight" -h string:x-dunst-stack-tag:brightness
+    notcmd="notify-send -h string:x-dunst-stack-tag:brightness"
   fi
+  $notcmd -a "changeVolume" -u low -i "$icon" \
+    -h int:value:"$brightness" "Brightness: $brightness%
+$bar"
 }
 
 case $direction in

scripts/.local/bin/control-volume

@@ -54,13 +54,16 @@ send_notification() {
   fi
 
   vol="$(get_volume)"
+  bar=$(seq -s "─" $((vol / 5)) | sed 's/[0-9]//g')
+
   if [ "$vol" -eq 0 ] || [ "$(get_mute)" = "off" ]; then
     # Show the sound muted notification
     $notcmd -a "changeVolume" -u low -i audio-volume-muted "Volume muted"
   else
     # Show the volume notification
     $notcmd -a "changeVolume" -u low -i audio-volume-high \
-      -h int:value:"$vol" "Volume: $vol%"
+      -h int:value:"$vol" "Volume: $vol%
+$bar"
   fi
 }