improve navigating saving with keyboard

css/app.css

@@ -421,6 +421,7 @@ button.action {
     background: #7092ff;
 }
 
+button.action:focus,
 button.action:hover {
     background: #597BE7;
 }

js/id/ui/commit.js

@@ -65,6 +65,7 @@ iD.ui.Commit = function(context) {
             .attr('class','user-info')
             .text(user.display_name)
             .attr('href', connection.url() + '/user/' + user.display_name)
+            .attr('tabindex', -1)
             .attr('target', '_blank');
 
         saveSection.append('p')

js/id/ui/success.js

@@ -42,7 +42,8 @@ iD.ui.Success = function(connection) {
             .on('click.save', function() {
                 event.cancel();
             })
-            .append('span').attr('class','label').text('Okay');
+            .text('Okay')
+            .node().focus();
     }
 
     return d3.rebind(success, event, 'on');