Assiduité: cosmetic timeline (borders)

app/static/css/minitimeline.css

@@ -171,6 +171,9 @@
     justify-content: flex-start;
     align-items: center;
     flex-direction: column;
+    box-sizing: border-box;
+    border-left: 1px solid rgb(144, 144, 144);
+    border-right: 1px solid rgb(144, 144, 144);
 }
 
 .mini-timeline-block {