Make the packet and packet_details have the same margins.

meshview/templates/packet.html

@@ -1,4 +1,4 @@
-<div class="card mt-1">
+<div class="card mt-2">
     <div class="card-header">
         {% set from_me = packet.from_node_id == node_id %}
         {% set to_me = packet.to_node_id == node_id %}