[kde-guidelines] Discouraging use of custom widget replacements

[Thomas Pfeiffer]

On Thursday 04 July 2013 13:26:34 David Edmundson wrote:

> (well, it can if you made your own slider, but that falls into the general
> scope of "use the base Qt/KDE UI elements rather than making your own")

This is something we definitely need to tell all HIG users. Suggested text:

All HIGs assume that the widgets referenced in the "Implementation" sections 
are used. Therefore they only contain guidelines for aspects which can be 
changed by the developer, to keep them as concise as possible.
If you feel your application needs something which the referenced standard KDE 
or Qt widget does not provide, do not create you own custom replacement, 
because it might violate best practice which is implemented in the standard 
widget. Instead, ask the KDE HIG team for advice on how to solve your specific 
problem.

Eould that text work? And if so: Where should we prominently place it?