Move public alert page to /superevents/public/O3/

gracedb/static/css/public.css

-
 @media screen and (max-device-width: 480px){
     body{
 	-webkit-text-size-adjust: none;
     }
 }
 
+button.tablesaw-sortable-btn {
+    cursor: pointer;
+}

gracedb/superevents/urls.py

@@ -35,5 +35,6 @@ urlpatterns = legacy_urlpatterns + [
         include(suburlpatterns)),
 
     # View of all candidates
-    url(r'^public/$', views.SupereventPublic.as_view(), name="public-alerts"),
+    url(r'^public/O3/$', views.SupereventPublic.as_view(),
+        name="public-alerts-O3"),
 ]

gracedb/templates/superevents/public_alerts.html

@@ -25,8 +25,8 @@
 <h3>Detection candidates: {{ candidates }}</h3>
 <br /><br />
 
-<div style="overflow-x: auto">
-<table class="tablesaw" data-tablesaw-sortable data-tablesaw-sortable-switch data-tablesaw-mode="columntoggle">
+<div class="tablesaw-overflow">
+<table class="tablesaw" data-tablesaw-sortable data-tablesaw-sortable-switch data-tablesaw-mode="columntoggle" data-tablesaw-minimap>
   <thead><tr>
       <th scope="col" data-tablesaw-sortable-col data-tablesaw-priority="persist">Event ID</th>
       <th scope="col" data-tablesaw-sortable-col data-tablesaw-priority="1">Possible Source (Probability)</th>