Tour fixes/improvements:

- Use a placeholder for the container id and repo name
- Add a skip button for docker login
- Add better messaging around permissions

static/css/quay.css

@@ -2876,6 +2876,11 @@ p.editable:hover i {
   border: 1px solid #ddd;
 }
 
+.angular-tour-ui-element .skip-message {
+  display: inline-block;
+  margin-left: 20px;
+}
+
 pre.command {
     padding: 20px;
     background: #fff;