Add support for cloning an upgrade record

until this is all ironed out, seems like it will often be helpful

tailbone/templates/master/clone.mako

@@ -0,0 +1,24 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/base.mako" />
+
+<%def name="title()">Clone ${model_title}: ${instance_title}</%def>
+
+<br />
+<p>You are about to clone the following ${model_title} as a new record:</p>
+
+<div class="form-wrapper">
+  ${form.render()|n}
+</div><!-- form-wrapper -->
+
+<br />
+<p>Are you sure about this?</p>
+<br />
+
+${h.form(request.current_route_url())}
+${h.csrf_token(request)}
+${h.hidden('clone', value='clone')}
+  <div class="buttons">
+    ${h.link_to("Whoops, nevermind...", form.cancel_url, class_='button autodisable')}
+    ${h.submit('submit', "Yes, please clone away", class_='autodisable')}
+  </div>
+${h.end_form()}

tailbone/templates/master/view.mako

@@ -27,8 +27,10 @@
 </%def>
 
 <%def name="context_menu_items()">
-  <li>${h.link_to("Back to {}".format(model_title_plural), index_url)}</li>
   <li>${h.link_to("Permalink for this {}".format(model_title), action_url('view', instance))}</li>
+  % if master.has_versions and request.rattail_config.versioning_enabled() and request.has_perm('{}.versions'.format(permission_prefix)):
+      <li>${h.link_to("Version History", action_url('versions', instance))}</li>
+  % endif
   % if master.editable and instance_editable and request.has_perm('{}.edit'.format(permission_prefix)):
       <li>${h.link_to("Edit this {}".format(model_title), action_url('edit', instance))}</li>
   % endif
@@ -38,6 +40,9 @@
   % if master.creatable and request.has_perm('{}.create'.format(permission_prefix)):
       <li>${h.link_to("Create a new {}".format(model_title), url('{}.create'.format(route_prefix)))}</li>
   % endif
+  % if master.cloneable and request.has_perm('{}.clone'.format(permission_prefix)):
+      <li>${h.link_to("Clone this as new {}".format(model_title), url('{}.clone'.format(route_prefix), uuid=instance.uuid))}</li>
+  % endif
 </%def>
 
 <ul id="context-menu">