pgAdmin4 v.4.8 Kubuntu / Chromium can't resize Properties dialog

To Whom it may concern,

Running pgAdmin4 version 4.8 on Chromium under Kubuntu. When I open the
properties dialog for a table, it is un-resizable and the horizontal scroll
bar doesn't work. This is particularly problematic as I can't get to all
the properties in the columns screen.

The developer's tool in Chromium shows these errors/warnings:

3 Unchecked runtime.lastError: Could not establish connection. Receiving
end does not exist.
vendor.js:93 exported wcDocker
vendor.js:155 sprintf() will be removed in the next major release, use the
sprintf-js package instead.
n @ vendor.js:155
:34105/static/js/generated/app.bundle.js?ver=40800:18 Uncaught TypeError:
Cannot read property 'chart_obj' of undefined
at Object.<anonymous>
(:34105/static/js/generated/app.bundle.js?ver=40800:18)
at l (vendor.js:39)
at Object.fireWith [as resolveWith] (vendor.js:39)
at u (vendor.js:39)
at XMLHttpRequest.<anonymous> (vendor.js:39)
vendor.js?ver=40800:39 [Deprecation] Synchronous XMLHttpRequest on the main
thread is deprecated because of its detrimental effects to the end user's
experience. For more help, check https://xhr.spec.whatwg.org/.

Any thoughts?

Thanks,

rik.