dashboard: allow selecting new state on forced status update

fixes #255

circle/dashboard/forms.py

@@ -720,13 +720,17 @@ class VmStateChangeForm(forms.Form):
         "Forcibly interrupt all running activities."),
         help_text=_("Set all activities to finished state, "
                     "but don't interrupt any tasks."))
+    new_state = forms.ChoiceField(Instance.STATUS, label=_(
+        "New status"))
 
     def __init__(self, *args, **kwargs):
         show_interrupt = kwargs.pop('show_interrupt')
+        status = kwargs.pop('status')
         super(VmStateChangeForm, self).__init__(*args, **kwargs)
 
         if not show_interrupt:
             self.fields['interrupt'].widget = HiddenInput()
+        self.fields['new_state'].initial = status
 
     @property
     def helper(self):

circle/dashboard/views.py

@@ -946,9 +946,11 @@ class VmStateChangeView(FormOperationMixin, VmOperationView):
 
     def get_form_kwargs(self):
         inst = self.get_op().instance
+        active_activities = InstanceActivity.objects.filter(
+            finished__isnull=True, instance=inst)
         show_interrupt = active_activities.exists()
         val = super(VmStateChangeView, self).get_form_kwargs()
-        val.update({'show_interrupt': show_interrupt})
+        val.update({'show_interrupt': show_interrupt, 'status': inst.status})
         return val