database access for rooms and mqtt client + generator

static/styles.css

@@ -90,3 +90,9 @@ tbody tr{
 .rooms-table input{
     width: 90%;
 }
+
+.current-readings .data-valid,
+.current-readings .data-late,
+.current-readings .data-missing{
+    padding: 0.2em 1em;
+}