[UI] Fixed showing of "disabled" placeholder for ratelimits in domains

data/web/templates/edit/domain.twig

@@ -168,7 +168,7 @@
                     <label class="control-label col-sm-2">{{ lang.edit.ratelimit }}</label>
                     <div class="col-sm-10">
                       <div class="input-group">
-                        <input name="rl_value" type="number" value="{{ rl.value }}" autocomplete="off" class="form-control placeholder="{{ lang.ratelimit.disabled }}">
+                        <input name="rl_value" type="number" value="{{ rl.value }}" autocomplete="off" class="form-control" placeholder="{{ lang.ratelimit.disabled }}">
                         <select name="rl_frame" class="form-control">
                         {% include 'mailbox/rl-frame.twig' %}
                         </select>