Move method from component to helper

The helper that returns the type of request action in a humanized
manner, is going to be used from another part of the code as well.

src/api/app/components/notification_notifiable_link_component.rb

@@ -14,10 +14,10 @@ def call
   def notifiable_link_text
     case @notification.event_type
     when 'Event::RequestStatechange', 'Event::RequestCreate', 'Event::ReviewWanted'
-      "#{type_of_action(@notification.notifiable)} Request ##{@notification.notifiable.number}"
+      "#{helpers.request_type_of_action(@notification.notifiable)} Request ##{@notification.notifiable.number}"
     when 'Event::CommentForRequest'
       bs_request = @notification.notifiable.commentable
-      "Comment on #{type_of_action(bs_request)} Request ##{bs_request.number}"
+      "Comment on #{helpers.request_type_of_action(bs_request)} Request ##{bs_request.number}"
     when 'Event::CommentForProject'
       'Comment on Project'
     when 'Event::CommentForPackage'
@@ -46,11 +46,4 @@ def notifiable_link_path
                                                              anchor: 'comments-list')
     end
   end
-
-  # Returns strings like "Add Role", "Submit", etc.
-  def type_of_action(bs_request)
-    return 'Multiple Actions\'' if bs_request.bs_request_actions.size > 1
-
-    bs_request.bs_request_actions.first.type.titleize
-  end
 end

src/api/app/helpers/webui/request_helper.rb

@@ -167,4 +167,11 @@ def list_maintainers(maintainers)
       user_with_realname_and_icon(maintainer, short: true)
     end.to_sentence.html_safe
   end
+
+  # Returns strings like "Add Role", "Submit", etc.
+  def request_type_of_action(bs_request)
+    return 'Multiple Actions\'' if bs_request.bs_request_actions.size > 1
+
+    bs_request.bs_request_actions.first.type.titleize
+  end
 end