enabled to inspect selection object on board

[kompiro]

added to handle some behavior on RubyScriptingConsole?.

method	behavior
this	get current selection on KanbanView?,too. The difference is it returns the object's model directly. You can get selected card and lane and so on.
selection	get current selection on KanbanView?. this method returns selection object directly. in many case, returns StructuredSelection. So you can handle multi objects.