[Refactor] Refactor the about page

This makes it available to logged in users, too.

calsocial/templates/base.html

@@ -45,6 +45,7 @@
 {% block content %}{% endblock %}
         </div>
         <footer class="ui segment">
+            <a href="{{ url_for('about') }}">{% trans %}About this instance{% endtrans %}</a><br>
             Soon…™
         </footer>
 {% block scripts %}{% endblock %}

calsocial/templates/welcome.html

@@ -4,6 +4,7 @@
 <div class="ui grid">
     <div class="row">
         <div class="four wide column">
+    {% if not current_user.is_authenticated %}
             <h2>{% trans %}Login{% endtrans %}</h2>
             <form class="ui form" method="post" action="{{ url_for('security.login') }}">
                 {{ login_form.hidden_tag() }}
@@ -13,18 +14,23 @@
                 {{ login_form.password }}
                 <button type="submit" class="fluid ui primary button">{% trans %}Login{% endtrans %}</button>
             </form>
-    {% if config.REGISTRATION_ENABLED %}
+        {% if config.REGISTRATION_ENABLED %}
             <div class="ui horizontal divider">
                 {% trans %}Or{% endtrans %}
             </div>
             <a href="{{ url_for('register' ) }}" class="fluid ui button">{% trans %}Register an account{% endtrans %}</a>
-    {% endif %}
+        {% endif %}
             <div class="ui horizontal divider"></div>
+    {% endif %}
             <h2>{% trans %}What is Calendar.social?{% endtrans %}</h2>
             <p>
                 {% trans %}Calendar.social is a calendar app based on open protocols and free, open source software.{% endtrans %}
                 {% trans %}It is decentralised like one of its counterparts, email.{% endtrans %}
             </p>
+    {% if current_user.is_authenticated %}
+            <div class="ui horizontal divider"></div>
+            <a href="" class="ui fluid primary button">{% trans %}Go to your calendar{% endtrans %}</a>
+    {% endif %}
         </div>
         <div class="twelve wide column">
             <h2>{% trans %}Peek inside{% endtrans %}</h2>
@@ -33,7 +39,7 @@
     </div>
     <div class="row">
         <div class="four wide column">
-            <h2>{% trans %}Built for users in mind{% endtrans %}</h2>
+            <h2>{% trans %}Built with users in mind{% endtrans %}</h2>
             <p>
                 {% trans %}From planning your appointments to organising large scale events Calendar.social can help with all your scheduling needs.{% endtrans %}
             </p>