add set_extra_icons function

abra.sh

@@ -192,6 +192,10 @@ done
 }
 
 set_icons(){
+if [ -n "$1" ]
+then
+APP_ICONS="$1"
+fi
 for icon in $APP_ICONS; do
     app=$(echo $icon | cut -d ":" -f1)
     file_path=$(eval echo $(echo $icon | cut -d ":" -f2))
@@ -202,6 +206,22 @@ for icon in $APP_ICONS; do
 done
 }
 
+set_extra_icons(){
+    if [ -z "$EXTRA_ICONS" ]
+    then
+        echo "Variable EXTRA_ICONS is not set"
+        exit 1
+    fi
+    export EXTRA_ICONS
+    icon_key_values=$(python3 -c "
+import json
+import os
+for key, value in json.loads(os.environ['EXTRA_ICONS']).items():
+    print(f'{key}:{value}')
+")
+    set_icons "$icon_key_values"
+}
+
 set_app_icon() {
 TOKEN=$(cat /run/secrets/admin_token)
 python -c """