anchor.diff:  
       <div class="col-sm-12 col-md-12">
         <div class="form-group">
  -        <select multiple="multiple" class="form-control admin-selectbox-height" v-model="selected_allowed_projects" number options="allowed_projects" v-on="dblclick: del()">
  +        <select multiple="multiple" class="form-control admin-selectbox-height" v-model="selected_allowed_projects" number @dblclick="del()">
  +          <option v-for="o in allowed_projects" :value="o.value">{{o.text}}</option>
           </select>
         </div>
       </div>
   
       <div class="col-sm-12 col-md-12">
         <div class="form-group">
  -        <button class="btn btn-default" v-on="click: del()">
  +        <button class="btn btn-default" @click="del()">
             <span class="glyphicon glyphicon-trash"></span>
           </button>
         </div>
  
positive.code: 
  <div class="col-md-12 col-sm-12">
    <div class="form-actions-top">
      <button class="btn btn-primary btn-sm" v-on="click: submit()">
        <%= t('common.btn.save_changes') %>
      </button>
    </div>
  
negative.code: <div class="col-md-7 col-sm-7">
    <div class="col-md-5 col-sm-5 form-group">
      <h5 class="page-header"><%= t('clients.client') %></h5>
      <select size="2" v-model="selected_client" number class="form-control admin-selectbox-height" @click="get_projects()">
        <option v-for="o in clients" :value="o.value">{{o.text}}</option>
      </select>
    </div>
    <div class="col-sm-7 col-md-7 form-group">
      <h5 class="page-header"><%= t('projects.project') %></h5>
      <select multiple="multiple" v-model="selected_projects" number class="form-control admin-selectbox-height" @dblclick="add()">
        <option v-for="o in projects" :value="o.value">{{o.text}}</option>
      </select>
    </div>
    <div class="col-sm-12 col-md-12">
      <div class="form-group">
        <button class="btn btn-default pull-right" @click="add()">
          <span class="glyphicon glyphicon-plus"></span>
        </button>
      </div>
  