Show group id in group settings

app/views/groups/edit.html.haml

 - breadcrumb_title "General Settings"
+- @content_class = "limit-container-width" unless fluid_layout
+
 .panel.panel-default.prepend-top-default
   .panel-heading
     Group settings

app/views/shared/_group_form.html.haml

@@ -32,6 +32,13 @@
       required: true,
       title: 'You can choose a descriptive name different from the path.'
 
+- if @group.persisted?
+  .form-group.group-name-holder
+    = f.label :id, class: 'control-label' do
+      = _("Group ID")
+    .col-sm-10
+      = f.text_field :id, class: 'form-control', readonly: true
+
 .form-group.group-description-holder
   = f.label :description, class: 'control-label'
   .col-sm-10

changelogs/unreleased/show-group-id-in-group-settings.yml

+---
+title: Show group id in group settings
+merge_request: 18482
+author: George Tsiolis
+type: added