Change device dashboard to use MQTT

examples/device-dashboard/web_root/style.css

@@ -4,7 +4,7 @@ select, input, label::before, textarea { outline: none; box-shadow:none !importa
 code, pre { color: #373; font-family: monospace; font-weight: bolder; font-size: smaller; background: #ddd; padding: 0.1em 0.3em; border-radius: 0.2em; }
 textarea, input, .addon { font-size: 15px; border: 1px solid #ccc; padding: 0.5em; }
 a, a:visited, a:active { color: #55f; }
-.addon { background: #eee; }
+.addon { background: #eee;  min-width: 9em;}
 .btn {
   background: #ccc; border-radius: 0.3em; border: 0; color: #fff; cursor: pointer;
   display: inline-block; padding: 0.6em 2em; font-weight: bolder;
@@ -16,6 +16,7 @@ a, a:visited, a:active { color: #55f; }
 .d-none { display: none; }
 .border { border: 1px solid #ddd; }
 .rounded { border-radius: 0.5em; }
+.nowrap { white-space: nowrap; }
 .msg { background: #def; border-left: 5px solid #59d; padding: 1em; margin: 1em 0; }
 .row { margin: 1% 0; overflow: auto; }
 .col { float: left; }