[JobUiDelegate] For message box create explicit KStandardGuiItem
Through some I18N filter voodoo I don't fully understand a KMessageBox
will get a default button label for an empty KGuiItem
but it
will not have a default icon.
This fixes Yes and No actions not having icons when a KIO worker issues a message box without specifying yes/no labels
Noticed this (or rather started caring about) when I did network/kio-extras!115 (merged)
Now has proper icons
Edited by Kai Uwe Broulik