[ticket/15538] Extract service and enhance icon function

PHPBB3-15538

phpBB/config/default/container/services.yml

@@ -29,6 +29,7 @@ imports:
     - { resource: services_text_formatter.yml }
     - { resource: services_text_reparser.yml }
     - { resource: services_twig.yml }
+    - { resource: services_twig_extensions.yml }
     - { resource: services_ucp.yml }
     - { resource: services_user.yml }
 

phpBB/config/default/container/services_twig.yml

@@ -54,13 +54,6 @@ services:
         tags:
             - { name: twig.extension }
 
-    template.twig.extensions.icon:
-        class: phpbb\template\twig\extension\icon
-        arguments:
-            - '@user'
-        tags:
-            - { name: twig.extension }
-
     template.twig.extensions.routing:
         class: phpbb\template\twig\extension\routing
         arguments:

phpBB/config/default/container/services_twig_extensions.yml

@@ -0,0 +1,9 @@
+# Twig extensions not needed by the installer
+
+services:
+    template.twig.extensions.icon:
+        class: phpbb\template\twig\extension\icon
+        arguments:
+            - '@user'
+        tags:
+            - { name: twig.extension }