Systemsettings has the ability to display an AboutDialog for the current module. However the relevant menu item is only shown when using the icon view or a global menu. The fact that nobody bothered to add it to the sidebar view is a hint at how useful it is.
We should either add it to sidebar mode as well or rip it out completely.
Note that I am not proposing this to make my life in T14733 easier. If we decided we do want this dialog then we can find an alternative solution, likely using KAboutPluginDialog.