Upgrades all the buttons in application settings

Uses a regeg replace to upgrade all the buttons in the application
settings folder.

ee/app/views/admin/application_settings/_elasticsearch_form.html.haml

@@ -102,7 +102,7 @@
 
         .sub-section
           %h4= _('Elasticsearch zero-downtime reindexing')
-          = link_to _('Trigger cluster reindexing'), admin_elasticsearch_trigger_reindexing_path, class: 'btn btn-primary', data: { confirm: _('Are you sure you want to reindex?') }, method: :post, disabled: @elasticsearch_reindexing_task&.in_progress?
+          = link_to _('Trigger cluster reindexing'), admin_elasticsearch_trigger_reindexing_path, class: 'gl-button btn btn-primary', data: { confirm: _('Are you sure you want to reindex?') }, method: :post, disabled: @elasticsearch_reindexing_task&.in_progress?
           .form-text.text-muted
             = _('This feature should be used with an index that was created after 13.0')
           - Elastic::ReindexingTask.old_indices_scheduled_for_deletion.each do |task|
@@ -174,4 +174,4 @@
             .form-text.text-muted
               = _('AWS Secret Access Key.  Only required if not using role instance credentials')
 
-      = f.submit _('Save changes'), class: "btn btn-success", data: { qa_selector: 'submit_button' }
+      = f.submit _('Save changes'), class: "gl-button btn btn-success", data: { qa_selector: 'submit_button' }

ee/app/views/admin/application_settings/_network_incident_management.html.haml

@@ -16,4 +16,4 @@
       = f.label :throttle_incident_management_notification_per_period, 'Rate limit period in seconds', class: 'label-bold'
       = f.number_field :throttle_incident_management_notification_per_period, class: 'form-control'
 
-  = f.submit 'Save changes', class: "btn btn-success"
+  = f.submit 'Save changes', class: "gl-button btn btn-success"

ee/app/views/admin/application_settings/_pseudonymizer.html.haml

@@ -15,4 +15,4 @@
             - else
               = pseudonymizer_disabled_description_text
 
-  = f.submit 'Save changes', class: "btn btn-success"
+  = f.submit 'Save changes', class: "gl-button btn btn-success"

ee/app/views/admin/application_settings/_required_instance_ci_setting.html.haml

@@ -22,4 +22,4 @@
           = dropdown_tag(s_('AdminSettings|No required pipeline'), options: { toggle_class: 'js-ci-template-dropdown dropdown-select', title: s_('AdminSettings|Select a template'), filter: true, placeholder: _("Filter"), data: { data: gitlab_ci_ymls(nil) } } )
           = f.text_field :required_instance_ci_template, value: @application_setting.required_instance_ci_template, id: 'required_instance_ci_template_name', class: 'hidden'
 
-      = f.submit _('Save changes'), class: "btn btn-success"
+      = f.submit _('Save changes'), class: "gl-button btn btn-success"

ee/app/views/admin/application_settings/_seat_link_form.html.haml

@@ -28,4 +28,4 @@
             - link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: link_path }
             = s_('For more information, see the documentation on %{link_start}disabling Seat Link%{link_end}.').html_safe % { link_start: link_start, link_end: '</a>'.html_safe }
 
-  = f.submit 'Save changes', class: "btn btn-success"
+  = f.submit 'Save changes', class: "gl-button btn btn-success"

ee/app/views/admin/application_settings/_slack.html.haml

@@ -31,4 +31,4 @@
           = f.label :slack_app_verification_token, 'Verification token', class: 'label-bold'
           = f.text_field :slack_app_verification_token, class: 'form-control'
 
-      = f.submit _('Save changes'), class: "btn btn-success"
+      = f.submit _('Save changes'), class: "gl-button btn btn-success"

ee/app/views/admin/application_settings/_templates.html.haml

@@ -19,4 +19,4 @@
                 = link_to 'template repository', help_page_path("user/admin_area/settings/instance_template_repository")
             = project_select_tag('application_setting[file_template_project_id]', class: 'project-item-select hidden-filter-value', toggle_class: 'js-project-search js-project-filter js-filter-submit', dropdown_class: 'dropdown-menu-selectable dropdown-menu-project js-filter-submit',
               placeholder: _('Search projects'), idAttribute: 'id', data: { order_by: 'last_activity_at', idattribute: 'id', all_projects: 'true', simple_filter: true, allow_clear: true }, value: @application_setting.file_template_project_id)
-        = f.submit 'Save changes', class: "btn btn-success"
+        = f.submit 'Save changes', class: "gl-button btn btn-success"