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/messaging/src/cms_messaging_module.e

@@ -223,12 +223,12 @@ $(document).ready(function() {
 		local
 			r: CMS_RESPONSE
 		do
-			if api.has_permission ("use messaging") or api.has_permission ("message any user") then
+			if api.has_permissions (<<"use messaging", "message any user">>) then
 				create {GENERIC_VIEW_CMS_RESPONSE} r.make (req, res, api)
 				r.values.force ("messaging", "messaging")
 				r.set_main_content (new_html_messaging_form (r, api))
 			else
-				create {FORBIDDEN_ERROR_CMS_RESPONSE} r.make (req, res, api)
+				create {FORBIDDEN_ERROR_CMS_RESPONSE} r.make_with_permissions (req, res, api, <<"use messaging", "message any user">>)
 			end
 			r.execute
 		end
@@ -314,7 +314,7 @@ $(document).ready(function() {
 				end
 				r.set_main_content (s)
 			else
-				create {FORBIDDEN_ERROR_CMS_RESPONSE} r.make (req, res, api)
+				create {FORBIDDEN_ERROR_CMS_RESPONSE} r.make_with_permissions (req, res, api, <<"message any user">>)
 			end
 			r.execute
 		end
@@ -337,9 +337,8 @@ feature {NONE} -- Contact Message
 	resolved_template_text (api: CMS_API; a_text: READABLE_STRING_GENERAL; a_target_user: detachable CMS_USER): STRING_8
 		local
 			smt: CMS_SMARTY_TEMPLATE_TEXT
-			utf: UTF_CONVERTER
 		do
-			create smt.make (utf.utf_32_string_to_utf_8_string_8 (a_text))
+			create smt.make (api.utf_8_encoded (a_text))
 			across
 				api.builtin_variables as vars_ic
 			loop