Need a special human name for this one, move to a method

app/models/filter/fields.rb

@@ -14,6 +14,17 @@ module Filter::Fields
     def default_value?(key, value)
       default_values[key.to_sym].eql?(value)
     end
+
+    def indexed_by_human_name(index)
+      case index
+      when "postponing_soon"
+        "Auto-closing soon"
+      when "all"
+        "Open"
+      else
+        index.humanize
+      end
+    end
   end
 
   included do

app/views/filters/settings/_indexed_by.html.erb

@@ -21,9 +21,10 @@
 
       <ul class="popup__list" data-filter-target="list" role="listbox">
         <% Filter::INDEXES.each do |index| %>
-          <%= tag.li class: "popup__item", data: { navigable_list_target: "item", combobox_target: "item", combobox_value: index, combobox_label: index.humanize }, role: "checkbox", aria: { checked: filter.indexed_by == index } do %>
+          <% label = Filter.indexed_by_human_name(index) %>
+          <%= tag.li class: "popup__item", data: { navigable_list_target: "item", combobox_target: "item", combobox_value: index, combobox_label: label }, role: "checkbox", aria: { checked: filter.indexed_by == index } do %>
             <button type="button" class="btn popup__btn" data-action="dialog#close combobox#change filter-settings#change form#submit">
-              <span class="overflow-ellipsis flex-item-grow"><%= index == "all" ? "Open" : index.humanize %></span>
+              <span class="overflow-ellipsis flex-item-grow"><%= label %></span>
               <%= icon_tag "check", class: "checked flex-item-justify-end" %>
             </button>
           <% end %>