This shook out of a discussion in https://bugs.kde.org/show_bug.cgi?id=413434.
Right now, most of our dialogs ask a question, and the buttons on the bottom row reflect possible answers to those questions: "ok/cancel"; "delete/restore" etc.
However some dialogs don't ask a question and are purely for displaying information. Examples include the "About this app" and "About KDE" dialogs:
These dialogs have a single Close button at the bottom of the window.
To me this seems a bit redundant since the window itself already has a close button in its titlebar. I'd like to explore the idea of removing the button for these kinds of dialogs, and only show a bottom button bar when there will be multiple buttons that each correspond to a possible answer to the question that the dialog is asking.
Thoughts?