slapos_cloud: Index also stop_requested like start_requested

This will prevent mistaken information when display the used amount of instances.

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/ComputerPartition_getAvailableSoftwareReleaseUrlStringList.py

@@ -13,7 +13,7 @@ elif slap_state == 'busy':
     validation_state="validated",
     default_aggregate_uid=context.getUid(),
   )
-  if (instance is None) or (instance.getSlapState() != "start_requested"):
+  if (instance is None) or (instance.getSlapState() not in ["start_requested", "stop_requested"]):
     return []
   else:
     return [instance.getUrlString()]

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/ComputerPartition_getSoftwareType.py

@@ -3,7 +3,7 @@ instance = context.getPortalObject().portal_catalog.getResultValue(
   validation_state="validated",
   default_aggregate_uid=context.getUid(),
 )
-if (instance is None) or (instance.getSlapState() != "start_requested"):
+if (instance is None) or (instance.getSlapState() not in ["start_requested", "stop_requested"]):
   return ""
 else:
   return instance.getSourceReference()