pgadmin4 client bug report

Hello,

I have not used pgadmin before. After following these
<https://wiki.postgresql.org/wiki/Apt> instructions I ran `pgadmin4`
(e.g. DESKTOP/client mode) and was presented with a splash screen and
then a browser window at http://127.0.0.1:<port>/browser/ that said:

Unauthorized

The server could not verify that you are authorized to access the
URL requested. You either supplied the wrong credentials (e.g. a bad
password), or your browser doesn't understand how to supply the
credentials required.

I discovered that ~/.pgAdmin4.xxx.addr contained the correct URL in the form
    http://127.0.0.1:<port>/?key=<uuid>

After copy/pasting that URL manually into the browser pgAdmin4 accepted
it and immediately redirected to the http://127.0.0.1:<port>/browser/
location and from there works beautifully.

It appears that a recent change added session keys for authenticating
the browser to the client. The authentication URL is correctly written
to the logs but then the wrong (old) URL is actually sent to the system
to pop up in the default browser.

OS: Ubuntu 16.04
Version screen:
Version
3.0
Copyright
Copyright 2013 - 2018, The pgAdmin Development Team
Python Version
3.5.2 (default, Nov 23 2017, 16:37:01) [GCC 5.4.0 20160609]
Flask Version
0.10.1
Application Mode
Desktop
Current User
pgadmin4(at)pgadmin(dot)org

Cheers,

tikkoneus