Greg, could you please take a look? We haven't done any changes in that are for quite long time, can't this be related to some GWT refactoring?
Three bugs here. 1. the dialog layout is old-style. I posted a patch to fix this in https://gerrit.ovirt.org/#/c/77129 2. the Cancel button doesn't work. Clicking X does. 3. Upon adding a value, it's not removed from the list, and can be added again, causing an exception. git blame shows it's mostly Alexander's code in HostProxySourceEditor -- assigning to him.
> 2. the Cancel button doesn't work. Clicking X does. This was fixed by https://gerrit.ovirt.org/#/c/71520/
Verified on ovirt-engine.noarch 0:4.2.0-0.0.master.20170903205106.gitb17261a.el7.centos The dialog can be closed by clicking on either OK or Cancel and no UI exception appears.
This bugzilla is included in oVirt 4.2.0 release, published on Dec 20th 2017. Since the problem described in this bug report should be resolved in oVirt 4.2.0 release, published on Dec 20th 2017, it has been closed with a resolution of CURRENT RELEASE. If the solution does not work for you, please open a new bug report.