Resolve "Check (responsive) design"

Closes #94 (closed)

Closes #100 (closed)

Closes #101 (closed)

aleksis/apps/alsijil/templates/alsijil/class_register/lesson.html

@@ -11,8 +11,7 @@
 
 {% block page_title %}
   {% with lesson_period.get_lesson_documentation as lesson_doc %}
-    <a
-            href="{% url "week_view_by_week" lesson_doc.year lesson_doc.week "group" lesson_period.lesson.groups.all.0.pk %}"
+    <a href="{% url "week_view_by_week" lesson_doc.year lesson_doc.week "group" lesson_period.lesson.groups.all.0.pk %}"
     class="btn-flat primary-color-text waves-light waves-effect btn-large">
       <i class="material-icons center">chevron_left</i>
     </a>