Download Handler in App not responsive

I am having the following issue: I created an app with a download functionality (which works fine in RStudio). When I run the app as a desktop app, the download handler is not responsive, meaning that nothing happens.

I ran the packaging as follows:

```
create_app(
app_name = "test_app_deployment",
app_dir = here(),
pkgs = libraries,
include_R = TRUE,
default_dir = "pf"
)

compile_iss()
```
sessionInfo():
- R version 3.5.0
- RInno_1.0.1

I extended the example App from RInno for creating a reproducible example. See [here](https://github.com/robur86/shiny_deployment_example).

Not sure if the download functionality has to be compiled somewhere or if I ran into a bug.

Btw: Great package!