Always show filters for legislation proposals

As done in the rest of the application: we show the filters even if
there isn't any data to display.

app/controllers/legislation/processes_controller.rb

@@ -95,8 +95,6 @@ class Legislation::ProcessesController < Legislation::BaseController
     @proposals = @proposals.search(params[:search]) if params[:search].present?
     @proposals = @proposals.send(@current_filter).order('random()').page(params[:page])
 
-    @valid_filters = [] unless @proposals.selected.any?
-
     if @process.proposals_phase.started? || (current_user && current_user.administrator?)
       legislation_proposal_votes(@proposals)
       render :proposals

app/views/legislation/processes/_proposals_content.html.erb

@@ -3,12 +3,12 @@
     <div class="row">
       <div class="small-12 medium-9 column">
         <div class="legislation-proposals">
+          <%= render 'shared/filter_subnav', i18n_namespace: "legislation.processes.proposals" %>
           <% if proposals.empty? %>
             <div class="callout primary">
               <p><%= t("legislation.processes.proposals.empty_proposals") %></p>
             </div>
           <% else %>
-            <%= render 'shared/filter_subnav', i18n_namespace: "legislation.processes.proposals" %>
             <%= render proposals %>
             <%= paginate proposals %>
           <% end %>