Add expand_runners variable

This allows the corresponding settings section to remain
uncollapsed

app/views/projects/runners/_specific_runners.html.haml

@@ -17,7 +17,7 @@
   %h4.underlined-title= _('Runners activated for this project')
   %ul.bordered-list.activated-specific-runners
     = render partial: 'projects/runners/runner', collection: @project_runners, as: :runner
-  = paginate @project_runners, theme: "gitlab", :params => { :anchor => '#js-runners-settings' }
+  = paginate @project_runners, theme: "gitlab", params: { expand_runners: true, anchor: '#js-runners-settings' }
 
 - if @assignable_runners.any?
   %h4.underlined-title= _('Available specific runners')

app/views/projects/settings/ci_cd/show.html.haml

@@ -33,7 +33,7 @@
 
 = render_if_exists 'projects/settings/ci_cd/protected_environments', expanded: expanded
 
-%section.settings.no-animate#js-runners-settings{ class: ('expanded' if expanded), data: { qa_selector: 'runners_settings_content' } }
+%section.settings.no-animate#js-runners-settings{ class: ('expanded' if expanded || params[:expand_runners]), data: { qa_selector: 'runners_settings_content' } }
   .settings-header
     %h4
       = _("Runners")