Fix: fpm pool config was not deleted when changing backend template

delete_web_backend() depends on which is set in prepare_web_backend()

bin/v-change-web-domain-backend-tpl

@@ -52,12 +52,12 @@ check_hestia_demo_mode
 #                       Action                             #
 #----------------------------------------------------------#
 
-# Deleting current backend
-delete_web_backend
-
 # Prepare new backend configuration
 prepare_web_backend
 
+# Deleting current backend
+delete_web_backend
+
 # Allocating backend port
 backend_port=9000
 ports=$(grep -v '^;' $pool/* 2>/dev/null |grep listen |grep -o :[0-9].*)