monitoring/css: change section title styling

* white on gray
* temporarily disabled autosubmit hint

modules/monitoring/public/css/module.less

@@ -218,6 +218,20 @@ table.avp {
         }
     }
 
+    h4 {
+        font-weight: normal;
+        color: white;
+        text-transform: uppercase;
+        background-color: #aaa;
+        display: block;
+        padding: 0.2em 1em 0.2em 1em;
+        font-size: 0.9em;
+    }
+
+    .autosubmit-warning {
+        display: none;
+    }
+
     .object-features {
         label {
             font-weight: normal;