/notes: default to listing notes, not posts. Remove group_by=post.

The posts listing is replaced by a link to order:note.

app/logical/post_sets/note.rb

@@ -1,17 +0,0 @@
-module PostSets
-  class Note < PostSets::Post
-    attr_reader :params
-    
-    def initialize(params)
-      # don't call super because we don't want to repeat these queries
-      @params = params
-      @tag_array = Tag.scan_query(params[:tags])
-      @page = params[:page] || 1
-      @posts = ::Post.tag_match(tag_string).has_notes.paginate(page, :limit => limit).reorder("last_noted_at desc")
-    end
-    
-    def limit
-     [(params[:limit] || CurrentUser.user.per_page).to_i, 1_000].min
-    end
-  end
-end