<div class="well well-small form form-inline clearfix">
    <% pairs[""] = ""; %>
    <% _.each(pairs, function (v, k) { %>
        <div class="fd-kv-pair control-row clearfix" style="margin-bottom: 5px;">
            <div class="span3"><input class="fd-kv-key input-block-level" type="text" value="<%=k%>" placeholder="key" /></div>
            <div class="span1" style="text-align:center;">&rarr;</div>
            <div class="span7"><input class="fd-kv-val input-block-level" type="text" value="<%=v%>" placeholder="value" /></div>
            <div class="span1"><a href="#" class="btn fd-kv-remove-pair btn-small btn-danger<% if (k =='') { %> hide<% } %>"><i class="icon-remove"></i></a></div>
        </div>
    <% }); %>
    <a href="#" class="btn fd-kv-add-pair hide"><i class="icon-plus"></i> Add Key&rarr;Value Pair</a>
</div>

<div class="well well-small form form-inline clearfix">
    <% pairs[""] = ""; %>
    <% _.each(pairs, function (v, k) { %>
        <div class="fd-kv-pair control-row clearfix" style="margin-bottom: 5px;">
            <div class="span3"><input class="fd-kv-key input-block-level" type="text" value="<%=k%>" placeholder="key" /></div>
            <div class="span1" style="text-align:center;">&rarr;</div>
            <div class="span7"><input class="fd-kv-val input-block-level jstree-drop" type="text" value="<%=v%>" placeholder="value" /></div>
            <div class="span1"><a href="#" class="btn fd-kv-remove-pair btn-small btn-danger<% if (k =='') { %> hide<% } %>"><i class="icon-remove"></i></a></div>
        </div>
    <% }); %>
    <a href="#" class="btn fd-kv-add-pair hide"><i class="icon-plus"></i> Add Key&rarr;Value Pair</a>
</div>

Allow drag/drop question into App Callout value
Allow drag/drop question into App Callout value