Fix group map display

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/views/Group/Group.vue

@@ -1366,4 +1366,8 @@ div.container {
     grid-template: 1fr;
   }
 }
+.map {
+  height: 60vh;
+  width: 100%;
+}
 </style>

lib/federation/activity_stream/converter/utils.ex

@@ -280,6 +280,7 @@ defmodule Mobilizon.Federation.ActivityStream.Converter.Utils do
 
       _ ->
         Logger.debug("not in our database, let's try to create it")
+        # This is odd, why do addresses have url instead of just @id?
         map = Map.put(map, "url", map["id"])
         do_get_address(map)
     end