Change unfold button text

(cherry picked from commit ef59ab86)

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

@@ -265,7 +265,7 @@
                 <p class="subtitle">
                   <span>{{ advanced_weekday.date }}</span>
                   <button class="btn-superflat right waves-effect unfold-trigger">
-                    {% trans "Display more" %} <i class="material-icons">
+                    {% trans "Unfold" %} <i class="material-icons">
                     expand_less
                   </i>
                   </button>