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
<h2>
<span class="Rk-CloseX">×</span>
<% if (options.show_node_tooltip_color) { %>
<span class="Rk-UserColor" style="background: <%-node.color%>;"></span>
<% } %>
<span class="Rk-Display-Title">
<% if (node.uri) { %>
<a href="<%-node.uri%>" target="_blank">
<% } %>
<%-node.title%>
<% if (node.uri) { %></a><% } %>
</span>
</h2>
<% if (node.uri && options.show_node_tooltip_uri) { %>
<video width="320" height="240" controls>
<source src="<%-node.uri%>" type="video/mp4">
</video>
<% } %>
<a href="#?idnode=<%-node._id%>"><%-renkan.translate("Link to the node")%></a>