fix a few bugs with app del uninstall and deletion

areas/apps/models.py

@@ -51,7 +51,8 @@ class App(db.Model):
         """
         # Delete all roles first
         for role in self.roles:
-            role.delete()
+            db.session.delete(role)
+        db.session.commit()
 
         db.session.delete(self)
         return db.session.commit()
@@ -166,6 +167,7 @@ class AppStatus():  # pylint: disable=too-few-public-methods
             self.installed = False
             self.ready = False
             self.message = "Not installed"
+            return
 
         for helmrelease in helmreleases:
             hr_status = helmrelease['status']