aria-controls should not include id-selector (so-called “hashtag”)

According to the docs and the validator, the aria-controls attribute should include the id of an element directly, without any selectors. Therefore the file templates/button/toggle.php should be corrected as follows:

<button type="button" class="quadmenu-navbar-toggle collapsed" data-quadmenu="collapse" data-target="<?php echo esc_attr($target); ?>" aria-expanded="false" aria-controls="quadmenu">
  <span class="icon-bar-container">
    <span class="icon-bar icon-bar-top"></span>
    <span class="icon-bar icon-bar-middle"></span>
    <span class="icon-bar icon-bar-bottom"></span>
  </span>
</button>

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