Address upstream review comments.

- Wrapp input field for max_attempts in label to be able to use classes instead of ids.

drag_and_drop_v2/public/css/drag_and_drop_edit.css

@@ -79,6 +79,11 @@
     font-size: 100%;
 }
 
+.xblock--drag-and-drop--editor .tab .nested-input {
+    display: block;
+    margin-top: 8px;
+}
+
 .xblock--drag-and-drop--editor .tab-header,
 .xblock--drag-and-drop--editor .tab-content,
 .xblock--drag-and-drop--editor .tab-footer {

drag_and_drop_v2/public/js/drag_and_drop_edit.js

@@ -511,7 +511,7 @@ function DragAndDropEditBlock(runtime, element, params) {
                         var data = {
                             'display_name': $element.find('#display-name').val(),
                             'mode': $element.find("#problem-mode").val(),
-                            'max_attempts': $element.find("#max-attempts").val(),
+                            'max_attempts': $element.find(".max-attempts").val(),
                             'show_title': $element.find('.show-title').is(':checked'),
                             'weight': $element.find('#weight').val(),
                             'problem_text': $element.find('#problem-text').val(),

drag_and_drop_v2/templates/html/drag_and_drop_edit.html

@@ -31,8 +31,14 @@
                     </select>
                     <span class="sr">{{ help_texts.mode }}</span>
 
-                    <label class="h3 setting assessment" for="max-attempts" title="{{ help_texts.max_attempts }}">{% trans "Maximum attempts" %}</label>
-                    <input class="setting assessment" id="max-attempts" type="number" min="1" step="1" {% if self.max_attempts %}value="{{ self.max_attempts }}"{% endif %} />
+                    <label class="h3 setting assessment" title="{{ help_texts.max_attempts }}">
+                      {% trans "Maximum attempts" %}
+                      <input class="nested-input max-attempts"
+                             type="number"
+                             min="1"
+                             step="1"
+                             {% if self.max_attempts %}value="{{ self.max_attempts }}"{% endif %} />
+                    </label>
 
                     <label class="h3" for="weight">{% trans "Maximum score" %}</label>
                     <input id="weight" type="number" step="0.1" value="{{ self.weight|unlocalize }}" />