Resolve "Improve week view for mobile devices (size s)"

Closes #186 (closed)

aleksis/apps/alsijil/static/css/alsijil/week_view.css

@@ -98,8 +98,10 @@ p.subtitle {
     transition: transform .5s 0s ease-in-out;
     rotate: 270deg;
     rotation: 270deg;
+    -webkit-transform: rotate(270deg);
 }
 
 .unfold-trigger.vertical i.material-icons {
     transform: rotate(-90deg);
+    -webkit-transform: rotate(180deg);
 }