Trigger dependencies are not overridden by new triggers in parent templates

Create a host/template with a trigger and add some dependencies to it. Then link a template to it, and create the same trigger in the parent template but without any dependencies. The trigger on the child host/template is converted to a templated trigger, but the dependencies remain. They should be overridden.

Other templated trigger configurable parameters like description may also be prone to such errors. Items and graphs should be checked too.