Welcome page: Explore should go to cloud.blender.org when logged in

Pointed out by Dr. Sybren

src/templates/welcome.pug

@@ -25,12 +25,13 @@ li
 
 | {% block navigation_user %}
 li.nav-item-sign-in
+	| {% if current_user.is_anonymous %}
 	a.navbar-item(href="{{ url_for('users.login', next='/') }}")
-		| {% if current_user.is_anonymous %}
 		| Log in and Explore
-		| {% else %}
+	| {% else %}
+	a.navbar-item(href="{{ url_for('main.homepage') }}")
 		| Explore
-		| {% endif %}
+	| {% endif %}
 | {% endblock navigation_user %}