Fixed issue with not being able to search text & filter

app/assets/javascripts/issuable.js.coffee

@@ -23,7 +23,16 @@ issuable_created = false
       .on 'keyup', ->
         clearTimeout(@timer)
         @timer = setTimeout( ->
-          Issuable.filterResults $('#issue_search_form')
+          $search = $('#issue_search')
+          $form = $('.js-filter-form')
+          $input = $("input[name='#{$search.attr('name')}']", $form)
+
+          if $input.length is 0
+            $form.append "<input type='hidden' name='#{$search.attr('name')}' value='#{$search.val()}'/>"
+          else
+            $input.val $search.val()
+
+          Issuable.filterResults $form
         , 500)
 
   toggleLabelFilters: ->

app/views/shared/issuable/_filter.html.haml

 .issues-filters
-  .issues-details-filters.gray-content-block.second-block
+  .issues-details-filters.row-content-block.second-block
     = form_tag page_filter_path(without: [:assignee_id, :author_id, :milestone_title, :label_name, :issue_search]), method: :get, class: 'filter-form js-filter-form' do
       - if params[:issue_search].present?
         = hidden_field_tag :issue_search, params[:issue_search]