anchor.diff:  <% i18nscope = 'time_sheets.show_footer' %>
   
  -<!-- wimi can accept time sheet here -->
  +<%# wimi can accept time sheet here %>
   <% if @time_sheet.status.include? 'pending' %>
  -  <!-- signed by hiwi status -->
  +  <%# signed by hiwi status %>
     <div class="row">
       <div class="col-md-12">
         <%= t('document_was', scope: i18nscope) %>
  
positive.code:       <%= t('signed', scope: i18nscope) %>
      </div>
    </div>
    <!-- form for accepting time sheet -->
    <%= form_for @time_sheet, url: accept_reject_time_sheet_path(@time_sheet), method: :get do |f| %>
  
      <!-- accept button -->
      <div class="row">
        <div class="col-md-12">
          <!-- if user has not set a signature: promt him here and disable button -->
          <% if current_user.signature.nil? %>
            <%= t('signature_warning') %>
            <%= link_to t('helpers.application_tabs.profile'), user_path(current_user), class: 'btn btn-default btn-xs' %><br/><br/>
            <%= f.submit t('accept', scope: i18nscope), class: 'btn btn-success btn-block', disabled: "disabled" %>
          <!-- else render buttons normally -->
          <% else %>
            <!-- sign check box -->
            <div class="control-group" style="text-align: center;">
              <%= f.check_box :wimi_signed %>
              <%= f.label t('add_signature', scope: i18nscope) %>
  
negative.code:       </div>
      </div>
  
      <%# reject message and button %>
      <div class="row vertical-align">
        <div class='col-sm-12'>
          <div class="form-group">
  