Kdevelop shows no buttons while choosing self-signed ssl-encrypted Subversion server

I'd like to create a new project with Kdevelop. While the creation process is running, Kdevelop asks me to enter the URL of my Subversion repository which I want to use. Usually, my Subversion server is reached by a ssl-encrypted https connection in my local network (as you can see in pt. #1 of the attachment). The appropriate certificate is self-signed by hand. And it is normal, that many apps will beef about the untrusted connection. That's okay. Kdevelop behaves so and shows me a new window after I clicked "Finish" (to see in pt. #2). As you can see, the window asks me, if I want to trust this certificate. And yes - I want ^^. But there's no button to click "OK" or something else to choose the untrusted connection. There's no chance to finish this "sightseeing tour". After I close this message window by the "X", Kdevelop is unusable. A kill of the program helps to close the entire window only.