Show functionality only for users with the ability to edit labels

app/views/projects/labels/index.html.haml

 - page_title "Labels"
+- hide_class = ''
 
 .top-area
   .nav-text
@@ -10,7 +11,7 @@
         New label
 
 .labels
-  - hide_class = ''
+  - if can?(current_user, :admin_label, @project)
     -# Only show it in the first page
     - if (params[:page].present? and params[:page] != '1') or @project.labels.blank? or (params[:page] == nil and @project.labels.blank?)
       - hide_class = 'hide'
@@ -22,6 +23,7 @@
         - else
           %p.empty-message No prioritized labels yet
   .other-labels
+    - if can?(current_user, :admin_label, @project)
       %h5{ class: hide_class } Other Labels
     - if @labels.present?
       %ul.content-list.manage-labels-list.js-other-labels

app/views/shared/_label_row.html.haml

 %span.label-row
+  - if can? current_user, :admin_label, @project
     .js-toggle-priority.toggle-priority{ data: { url: remove_priority_namespace_project_label_path(@project.namespace, @project, label),
       dom_id: dom_id(label) } }
       %button.add-priority.btn.has-tooltip{ title: 'Prioritize', :'data-placement' => 'top' }