Allow admins to select proposals and users to list them

app/controllers/proposals_controller.rb

@@ -51,6 +51,7 @@ class ProposalsController < ApplicationController
     discard_draft
     discard_archived
     load_retired
+    load_selected
     load_featured
   end
 
@@ -139,6 +140,10 @@ class ProposalsController < ApplicationController
       end
     end
 
+    def load_selected
+      @resources = @resources.selected if params[:selected].present?
+    end
+
     def load_featured
       return unless !@advanced_search_terms && @search_terms.blank? && @tag_filter.blank? && params[:retired].blank? && @current_order != "recommendations"
       if Setting["feature.featured_proposals"]