Fix url generation in AbstractBrowserBinding::getTypeDefinitionInternal

Summary:
The function `AbstractBrowserBinding::getTypeDefinitionInternal()` generates a
URL to get the type definition internals. The url was build wrong because the query
was overwritten and not modified which ends up in an invalid url.

Reviewers: #forgetit-dev, claus.due

Reviewed By: #forgetit-dev, claus.due

Differential Revision: https://phabricator.dkd.de/D442