Change requests API. (instruments)

Now all requests return their result as a dict and a list of not found values as a list.
Change requests API. (tasks_manager)

Now all requests return their result as a dict and a list of not found values as a list.(save for config request)
WIP on task edition.

The standard editor is implemented and the tree is functionnal still have to create dialog and dockItem.
Some fix in process engine + id attr.
Add id to BaseMonitor + monitor edition.