Renames the "archive" action to "ignore_flag" (+)

* archived_at -> ignored_flag_at
* archived? -> ignored_flag?
* archive -> ignore_flag
* pending -> pending_flag_review
* archived (scope) -> with_ignored_flag
* I18n changes

app/controllers/moderation/comments_controller.rb

@@ -19,8 +19,8 @@ class Moderation::CommentsController < Moderation::BaseController
     redirect_to request.query_parameters.merge(action: :index)
   end
 
-  def archive
-    @comment.archive
+  def ignore_flag
+    @comment.ignore_flag
     redirect_to request.query_parameters.merge(action: :index)
   end
 
@@ -31,7 +31,7 @@ class Moderation::CommentsController < Moderation::BaseController
     end
 
     def set_valid_filters
-      @valid_filters = %w{all pending archived}
+      @valid_filters = %w{all pending_flag_review with_ignored_flag}
     end
 
     def parse_filter