Removed obsolete calls, harmonized predefine response, added non admin user pages.

When access is denied, also provide when possible and wanted, the needed
permissions so that in the future, user will be able to ask for
permission easily.
Renamed previous user handlers as admin user handlers.
Added non admin user handler /user/{uid} .
Add new `send_...` response to `CMS_API.response_api`, and use them
instead of `create {...RESPONSE}.... ; execute`.
Fixed potential issue with storage mailer initialization if folder does
not exist.
Added utf_8_encoded helpers function on CMS_API interface.
Fixed a few unicode potential issues.
Removed a few obsolete calls.

modules/node/cms_node_module.e

@@ -372,7 +372,7 @@ feature -- Hooks
 				loop
 					if
 						attached ic.item.typename as l_typename and then
-						across l_node_typenames as t_ic some t_ic.item.same_string (l_typename) end
+						across l_node_typenames as t_ic some t_ic.item.same_string_general (l_typename) end
 					then
 						if ic.item.entity.is_integer then
 							nid := ic.item.entity.to_integer_64