Apply gl-button class to projects/mirrors directory

app/views/projects/mirrors/_mirror_repos.html.haml

@@ -6,7 +6,7 @@
 %section.settings.project-mirror-settings.no-animate#js-push-remote-settings{ class: mirror_settings_class, data: { qa_selector: 'mirroring_repositories_settings_content' } }
   .settings-header
     %h4= _('Mirroring repositories')
-    %button.btn.js-settings-toggle
+    %button.btn.gl-button.js-settings-toggle
       = expanded ? _('Collapse') : _('Expand')
     %p
       = _('Set up your project to automatically push and/or pull changes to/from another repository. Branches, tags, and commits will be synced automatically.')
@@ -74,4 +74,4 @@
                       - if mirror.ssh_key_auth?
                         = clipboard_button(text: mirror.ssh_public_key, class: 'btn btn-default', title: _('Copy SSH public key'), qa_selector: 'copy_public_key_button')
                       = render 'shared/remote_mirror_update_button', remote_mirror: mirror
-                    %button.js-delete-mirror.qa-delete-mirror.rspec-delete-mirror.btn.btn-danger{ type: 'button', data: { mirror_id: mirror.id, toggle: 'tooltip', container: 'body' }, title: _('Remove') }= sprite_icon('remove')
+                    %button.js-delete-mirror.qa-delete-mirror.rspec-delete-mirror.btn.gl-button.btn-danger{ type: 'button', data: { mirror_id: mirror.id, toggle: 'tooltip', container: 'body' }, title: _('Remove') }= sprite_icon('remove')

app/views/projects/mirrors/_regenerate_public_ssh_key_confirm_modal.html.haml

@@ -9,5 +9,5 @@
       .modal-body
         %p= _('Are you sure you want to regenerate the public key? You will have to update the public key on the remote server before mirroring will work again.')
       .form-actions.modal-footer
-        = button_tag _('Cancel'), type: 'button', class: 'btn js-cancel'
-        = button_tag _('Regenerate key'), type: 'button', class: 'btn btn-inverted btn-warning js-confirm'
+        = button_tag _('Cancel'), type: 'button', class: 'btn gl-button js-cancel'
+        = button_tag _('Regenerate key'), type: 'button', class: 'btn gl-button btn-inverted btn-warning js-confirm'

app/views/projects/mirrors/_ssh_host_keys.html.haml

@@ -3,7 +3,7 @@
 - verified_at = mirror.ssh_known_hosts_verified_at
 
 .form-group.js-ssh-host-keys-section{ class: ('collapse' unless mirror.ssh_mirror_url?) }
-  %button.btn.btn-inverted.btn-secondary.inline.js-detect-host-keys.gl-mr-3{ type: 'button', data: { qa_selector: 'detect_host_keys' } }
+  %button.btn.gl-button.btn-inverted.btn-secondary.inline.js-detect-host-keys.gl-mr-3{ type: 'button', data: { qa_selector: 'detect_host_keys' } }
     .js-spinner.d-none.spinner.mr-1
     = _('Detect host keys')
   .fingerprint-ssh-info.js-fingerprint-ssh-info.gl-mt-3.gl-mb-3{ class: ('collapse' unless mirror.ssh_mirror_url?) }
@@ -23,7 +23,7 @@
         #{time_ago_in_words(verified_at)} ago
 
   .js-ssh-hosts-advanced.inline
-    %button.btn.btn-default.btn-show-advanced.show-advanced{ type: 'button' }
+    %button.btn.gl-button.btn-default.btn-show-advanced.show-advanced{ type: 'button' }
       %span.label-show
         = _('Input host keys manually')
       %span.label-hide