Iphone test Problems

@pbeke

I've tried out the signature workflow on Iphone X, IOS 13.5.1

there are two problems:

• if you open the modal dialog (without scrolling the site) and closing it -> the menu with logging out opens
• if I press the "download zip" button, nothing happens

Zip Upload is working, don't know why it didn't worked before.

mentioned in commit dbp/web-components/toolkit@1a85271a

closed