Modifying parent attributes from child elements

[Nicryc]

Two feature requests to modify a parent from a child element:

• Be able to disable a parent if all children of that parent are also disabled.
• Add the possibility to merge a parent with its child when there is only one item in the menu. For example I have a menu "Paste…" that contains a child "Paste link" among several others that are not always displayed. When "Paste link" is alone in the menu it would be great to be able to replace the menu "Paste…" by the item "Paste link".