Add basic support for performing / tracking app upgrades

also add `MasterView.executable` and friends

tailbone/templates/master/create.mako

@@ -1,4 +1,4 @@
-## -*- coding: utf-8 -*-
+## -*- coding: utf-8; -*-
 <%inherit file="/base.mako" />
 
 <%def name="title()">New ${model_title}</%def>
@@ -6,6 +6,17 @@
 <%def name="extra_javascript()">
   ${parent.extra_javascript()}
   ${self.disable_button_js()}
+  % if dform is not Undefined:
+      % for field in dform:
+          <% resources = field.get_widget_resources() %>
+          % for path in resources['js']:
+              ${h.javascript_link(request.static_url(path))}
+          % endfor
+          % for path in resources['css']:
+              ${h.stylesheet_link(request.static_url(path))}
+          % endfor
+      % endfor
+  % endif
 </%def>
 
 <%def name="disable_button_js()">

tailbone/templates/master/edit.mako

@@ -1,10 +1,10 @@
-## -*- coding: utf-8 -*-
+## -*- coding: utf-8; -*-
 <%inherit file="/base.mako" />
 
 <%def name="title()">Edit ${model_title}: ${instance_title}</%def>
 
-<%def name="head_tags()">
-  ${parent.head_tags()}
+<%def name="extra_javascript()">
+  ${parent.extra_javascript()}
   <script type="text/javascript">
 
     $(function() {
@@ -18,6 +18,17 @@
 
     });
   </script>
+  % if dform is not Undefined:
+      % for field in dform:
+          <% resources = field.get_widget_resources() %>
+          % for path in resources['js']:
+              ${h.javascript_link(request.static_url(path))}
+          % endfor
+          % for path in resources['css']:
+              ${h.stylesheet_link(request.static_url(path))}
+          % endfor
+      % endfor
+  % endif
 </%def>
 
 <%def name="context_menu_items()">

tailbone/templates/upgrades/view.mako

@@ -0,0 +1,19 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/master/view.mako" />
+
+${parent.body()}
+
+% if not instance.executed and request.has_perm('{}.execute'.format(permission_prefix)):
+    <div class="buttons">
+      % if instance.enabled and not instance.executing:
+          ${h.form(url('{}.execute'.format(route_prefix), uuid=instance.uuid))}
+          ${h.csrf_token(request)}
+          ${h.submit('execute', "Execute this upgrade", class_='autodisable')}
+          ${h.end_form()}
+      % elif instance.enabled:
+          <button type="button" disabled="disabled" title="This upgrade is currently executing">Execute this upgrade</button>
+      % else:
+          <button type="button" disabled="disabled" title="This upgrade is not enabled">Execute this upgrade</button>
+      % endif
+    </div>
+% endif