features and tasks could be disabled instead of removed

[leoscholl]

that way, adding a feature or task that was previously disabled won't create a new entry in the database.

because now, if you remove a feature, it goes away forever, so copying any tasks that used that feature will not transfer the feature, even if it has been re-enabled

[leoscholl]

the thing to do is to add the features to built_in_features.__init__.py that way they are persistent