Remove the 'kuick' libkonqueror plugin due usability concerns

Kuick is good at copying and moving files quickly. It remembers the last used directories and can be a real powertool.

There are too many downsides though:
- if we want to show too many folders we have many QPopupMenus across the screen
- we have one more way of navigating through the filesystem
- It conflicts with the normal copy and paste.
- For Contacts it is more like a "Send To" instead of Copy To

And last but not least for KDE4 the usability guys are redesigning the Konqueror Userinterface anyway and I'm sure there will be a way to quickly move files around.
E.g. by having the KFileDialog sidebar in Konqueror...

On Monday I will remove this plugin interface from Konqueror as no-one has used it besides kuick.