Make feature flag table actions a button group

app/views/projects/feature_flags/_table.html.haml

@@ -14,14 +14,14 @@
         .text-secondary= feature_flag.description
 
       .table-section.section-40.table-button-footer{ role: 'gridcell' }
-        .table-action-buttons
+        .table-action-buttons.btn-group
           = link_to edit_project_feature_flag_path(@project, feature_flag),
               class: 'btn btn-default has-tooltip',
               type: 'button',
               title: _('Edit') do
             = sprite_icon('pencil', size: 16)
 
-          %button.btn.btn-danger.has-tooltip.ml-2{ type: 'button',
+          %button.btn.btn-danger.has-tooltip{ type: 'button',
               data: { toggle: 'modal',
                 target: "#delete-feature-flag-modal-#{feature_flag.id}" },
               title: _('Delete') }