improve view management:
- we can pass a negative view index, in this case we count from the end of the list of view
- before creating/changing the view representation, we remove the previous one and reinitialize the node visibility
- each time we save a view, it creates a new one at the end of the list
- "restore" view loads the last view of the list
<div class='row'>
<h3>Confirm the deletion of the renkan with title '<?php echo($renkan['title']); ?>'</h3>
</div>
<div class='row renkandel-buttons'>
<div class="large-12 column"><form action='<?php echo($self_url)?>' method='POST'><input type='hidden' name='renkanId' value='<?php echo($renkan['id']); ?>'/><button type='submit'>Yes</button></form>
<form action='index.php' method='GET'><button type='submit'>No</button></form></div>
</div>