Show warning message for rTorrent that it doesn't support torrent removal

src/UI/Form/FormMessage.js

@@ -0,0 +1,17 @@
+var Handlebars = require('handlebars');
+
+Handlebars.registerHelper('formMessage', function(message) {
+    if (!message) {
+        return '';
+    }
+
+    var level = message.type;
+
+    if (message.type === 'error') {
+        level = 'danger';
+    }
+
+    var messageHtml = '<div class="alert alert-{0}" role="alert">{1}</div>'.format(level, message.message);
+
+    return new Handlebars.SafeString(messageHtml);
+});