show sdr device log messages in the web configuration

htdocs/css/admin.css

@@ -159,4 +159,8 @@ h1 {
 
 .imageupload.is-invalid ~ .invalid-feedback {
     display: block;
+}
+
+.device-log-messages {
+    max-height: 500px;
 }

htdocs/lib/settings/LogMessages.js

@@ -0,0 +1,5 @@
+$.fn.logMessages = function() {
+    $.each(this, function(){
+        $(this).scrollTop(this.scrollHeight);
+    });
+};

htdocs/settings.js

@@ -8,4 +8,5 @@ $(function(){
     $('.optional-section').optionalSection();
     $('#scheduler').schedulerInput();
     $('.exponential-input').exponentialInput();
+    $('.device-log-messages').logMessages();
 });