Add getChildWithKey method.
Add missing string.
Doesn't recreate the tree view when user add a value, list or dict.
Correction of a bug when adding a dict or a list.
Remove a node without recreating the whole tree.
Correction of the contextual menu according to the new way to add/remove item in the treeview.
Doesn't recreate the tree when user edit a key.
Merge branch 'develop' into 'master'.