Apply gl-button class to project/pages directory

app/views/projects/pages/_destroy.haml

@@ -8,7 +8,7 @@
         %p
           = s_('GitLabPages|Removing pages will prevent them from being exposed to the outside world.')
         .form-actions
-          = link_to s_('GitLabPages|Remove pages'), project_pages_path(@project), data: { confirm: s_('GitLabPages|Are you sure?')}, method: :delete, class: "btn btn-remove"
+          = link_to s_('GitLabPages|Remove pages'), project_pages_path(@project), data: { confirm: s_('GitLabPages|Are you sure?')}, method: :delete, class: "btn gl-button btn-remove"
   - else
     .nothing-here-block
       = s_('GitLabPages|Only project maintainers can remove pages')

app/views/projects/pages/_list.html.haml

@@ -21,8 +21,8 @@
                   %span.badge.badge-danger
                     = s_('GitLabPages|Expired')
           %div
-            = link_to s_('GitLabPages|Edit'), project_pages_domain_path(@project, domain), class: "btn btn-sm btn-grouped btn-success btn-inverted"
-            = link_to s_('GitLabPages|Remove'), project_pages_domain_path(@project, domain), data: { confirm: s_('GitLabPages|Are you sure?')}, method: :delete, class: "btn btn-remove btn-sm btn-grouped"
+            = link_to s_('GitLabPages|Edit'), project_pages_domain_path(@project, domain), class: "btn gl-button btn-sm btn-grouped btn-success btn-inverted"
+            = link_to s_('GitLabPages|Remove'), project_pages_domain_path(@project, domain), data: { confirm: s_('GitLabPages|Are you sure?')}, method: :delete, class: "btn gl-button btn-remove btn-sm btn-grouped"
         - if domain.needs_verification?
           %li.list-group-item.bs-callout-warning
             - details_link_start = "<a href='#{project_pages_domain_path(@project, domain)}'>".html_safe

app/views/projects/pages/show.html.haml

@@ -5,7 +5,7 @@
     = s_('GitLabPages|Pages')
 
     - if can?(current_user, :update_pages, @project) && (Gitlab.config.pages.external_http || Gitlab.config.pages.external_https)
-      = link_to new_project_pages_domain_path(@project), class: 'btn btn-success float-right', title: s_('GitLabPages|New Domain') do
+      = link_to new_project_pages_domain_path(@project), class: 'btn gl-button btn-success float-right', title: s_('GitLabPages|New Domain') do
         = s_('GitLabPages|New Domain')
 
   %p.light