Nyall Dawson d43f1a2823 [processing] Allow models to have no group name set
This is supported by the toolbox now, so relax the requirement
that all models have a compulsory group name. If no group is set,
the model is shown directly under the Models node in the toolbox.

Also switch a warning from message box to message bar
2018-07-18 08:56:52 +10:00
..