fix message spacing on Safari caused by switching back to <li/>s...

src/skins/vector/css/organisms/RoomView.css

@@ -121,6 +121,10 @@ limitations under the License.
     padding: 0px;
 }
 
+.mx_RoomView_MessageList li {
+    clear: both;
+}
+
 .mx_RoomView_MessageList h2 {
     clear: both;
     margin-top: 32px;