Pass on search params presence flag to roadmap app

ee/app/views/groups/roadmap/show.html.haml

@@ -4,9 +4,11 @@
 - @content_class = "group-epics-roadmap"
 - breadcrumb_title _("Epics Roadmap")
 
+- has_filters_applied = params[:label_name].present? || params[:author_username].present? || params[:search].present?
+
 - if @epics_count != 0
   = render 'shared/epic/search_bar', type: :epics, hide_sort_dropdown: true
 
-  #js-roadmap{ data: { epics_path: group_epics_path(@group, format: :json), group_id: @group.id, empty_state_illustration: image_path('illustrations/epics/roadmap.svg') } }
+  #js-roadmap{ data: { epics_path: group_epics_path(@group, format: :json), group_id: @group.id, empty_state_illustration: image_path('illustrations/epics/roadmap.svg'), has_filters_applied: "#{has_filters_applied}" } }
 - else
   = render 'shared/empty_states/roadmap'