Keep publisher.create_widget variant when creating subsets

Whenever a person is creating a subset to publish, the "creator" widget
resets (where you choose the variant, product, etc.) so if the person
is publishing several images of the a variant which is not the default
one, they have to keep selecting the correct one after every "create".

This commit resets the original variant upon successful creation of a
subset for publishing.

openpype/tools/publisher/widgets/create_widget.py

@@ -828,6 +828,7 @@ class CreateWidget(QtWidgets.QWidget):
 
         if success:
             self._set_creator(self._selected_creator)
+            self.variant_input.setText(variant)
             self._controller.emit_card_message("Creation finished...")
             self._last_thumbnail_path = None
             self._thumbnail_widget.set_current_thumbnails()