bitbake: hob: change behavior for "cancel" button from the Recipe selection page

-when returned to the Image configuration page, after canceling on the
Recipe selection page, the image selected previously is now shown corectly

[YOCTO #3205}
(Bitbake rev: 0a755026661a18ae386eb64b807e9e9e8f0dfe4c)

Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/crumbs/builder.py

@@ -126,6 +126,7 @@ class Configuration:
         self.selected_image = None
         self.selected_recipes = []
         self.selected_packages = []
+        self.initial_selected_image = None
         self.initial_selected_packages = []
         self.initial_user_selected_packages = []
 

bitbake/lib/bb/ui/crumbs/imageconfigurationpage.py

@@ -432,6 +432,7 @@ class ImageConfigurationPage (HobPage):
         self.builder.just_bake()
 
     def edit_image_button_clicked_cb(self, button):
+        self.builder.configuration.initial_selected_image = self.builder.configuration.selected_image
         self.builder.show_recipes()
 
     def template_button_clicked_cb(self, button):

bitbake/lib/bb/ui/crumbs/recipeselectionpage.py

@@ -193,6 +193,9 @@ class RecipeSelectionPage (HobPage):
         self.builder.build_packages()
 
     def back_button_clicked_cb(self, button):
+        self.builder.recipe_model.set_selected_image(self.builder.configuration.initial_selected_image)
+        self.builder.image_configuration_page.update_image_combo(self.builder.recipe_model, self.builder.configuration.initial_selected_image)
+        self.builder.image_configuration_page.update_image_desc()
         self.builder.show_configuration()
 
     def refresh_selection(self):