- Move Ice types into data namespace, add native C++ wrappers
- Fix swallowing context menus on error
- Fix breaking on lost connection
- Add "actions" as an interface in the MNS
- Expand on example in ExampleMemory

Also adds actions to the ExampleMemory for demonstration purposes.

This hides flickering until the next commit is made by the client to update the element

Also adds default implementations for action methods, so all the
existing memory servers should continue to work.