Changed the way how DNS-server start error is handled. Now ALFIS starts normally, and the error is shown in GUI.

src/webview/index.html

@@ -450,6 +450,11 @@
     <p id="warning_text"></p>
 </div>
 
+<div class="notification mini is-danger is-hidden" id="notification_error">
+    <button class="delete" id="error_close"></button>
+    <p id="error_text"></p>
+</div>
+
 <div class="notification mini is-success is-hidden" id="notification_success">
     <button class="delete" id="success_close"></button>
     <p id="success_text"></p>

src/webview/scripts.js

@@ -472,6 +472,19 @@ function showWarning(text) {
     setTimeout(button.onclick, 5000);
 }
 
+function showError(text) {
+    var warning = document.getElementById("notification_error");
+    var message = document.getElementById("error_text");
+    message.innerHTML = text;
+
+    warning.className = "notification mini is-danger";
+    var button = document.getElementById("error_close");
+    button.onclick = function() {
+        message.value = "";
+        warning.className = "notification mini is-danger is-hidden";
+    }
+}
+
 function showSuccess(text) {
     var warning = document.getElementById("notification_success");
     var message = document.getElementById("success_text");

src/webview/styles.css

@@ -100,6 +100,12 @@ body {
   right: 10pt;
 }
 
+.notification.mini.is-danger {
+  position: absolute;
+  bottom: 30pt;
+  right: 10pt;
+}
+
 .notification.mini.is-success {
   position: absolute;
   bottom: 30pt;