[GNUe] Little enhancement for Designer

[Julio Cesar Gazquez]

Replicate the popup menus in the form of context sensitive menus in the Object 
Navigator. So, in order to get the popup for a given block or datasource, I 
just need to right-click on it, that is faster than navigating around the 
popup hierarchy, and also a more natural approach and a widely used UI 
practice.

In-place renaming of objects should be nice, too :) 

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Saludos

Julio César Gázquez