Deprecate defunct KNS3::standardActionUpload method
These methods are rarely used, enforce the Qt4 connect syntax and the only useful thing they do is to set the icon name.
Also it needs the KXMGUI dependency, and in KF6 we have the goal to remove inter-framework dependencies.
And the standard way to use the KNS components are the buttons anyways.
Edited by Alexander Lohnau