Intergrating mht file to konqueror

[Spiros Georgaras]

David Faure wrote:
> Don't forget to add this to your mimetype .desktop file:
>
> [Property::X-KDE-LocalProtocol]
> Type=QString
> Value=mht
>
> Hmm, it looks like x-zip.desktop is missing it...

I think that none of the desktop files under kdelibs/mimetypes have a 
[Property::X-KDE-LocalProtocol] defined...

I am looking at 3.3.0 kdelibs, but I think this is not relevant....