let's move some logic to the dialog

htdocs/lib/BookmarkDialog.js

@@ -7,6 +7,30 @@ $.fn.bookmarkDialog = function() {
             }).map(function(m) {
                 return '<option value="' + m.modulation + '">' + m.name + '</option>';
             }).join(''));
+            return this;
+        },
+        setValues: function(bookmark) {
+            var $form = $el.find('form');
+            ['name', 'frequency', 'modulation'].forEach(function(key){
+                $form.find('#' + key).val(bookmark[key]);
+            });
+            $el.data('id', bookmark.id || false);
+            return this;
+        },
+        getValues: function() {
+            var bookmark = {};
+            var valid = true;
+            ['name', 'frequency', 'modulation'].forEach(function(key){
+                var $input = $el.find('#' + key);
+                valid = valid && $input[0].checkValidity();
+                bookmark[key] = $input.val();
+            });
+            if (!valid) {
+                $el.find("form :submit").click();
+                return;
+            }
+            bookmark.id = $el.data('id');
+            return bookmark;
         }
     }
 }