Highlight followed space launches

Closes: #159

agenda/thespacedevs.py

@@ -125,6 +125,7 @@ def summarize_launch(launch: Launch) -> Summary:
 
     return {
         "name": launch.get("name"),
+        "slug": launch["slug"],
         "status": launch.get("status"),
         "net": launch.get("net"),
         "net_precision": net_precision,

templates/launches.html

@@ -7,8 +7,9 @@
   <h1>Space launches</h1>
 
   {% for launch in rockets %}
+    {% set highlight =" bg-primary-subtle" if launch.slug in config.FOLLOW_LAUNCHES else "" %}
     {% set country = get_country(launch.country_code) %}
-    <div class="row">
+    <div class="row{{highlight}}">
       <div class="col-md-1 text-nowrap text-md-end">{{ launch.t0_date }}
 
         <br class="d-none d-md-block"/>