odemisd: no need for special case for Microscope in is_leaf anymore

now that microscope has a "children" attribute, it can be handled normally.
odemisd: new methods to be able to instantiate components online

Still all done at initialisation, but now it's just a matter of running the microscope container as
soon as the microscope is ready.
odemisd: update VA and affects after a component is instantiated

now should be fully like previously.
odemisd: clean up