Right panel not properly updated on new/load scene

[vincentfretin]

Steps:

• load a scene
• select environment layer
• open right panel
• click new scene button

Issue: The right panel still show old data for street-environment component.

Solution: The right panel needs to refresh on newScene event.

[vincentfretin]

I tried to forceUpdate on newScene event in Sidebar, but that didn't work. I think the panel is still showing the removed environment entity, but changing the environment preset is still working, weird.
I reproduce the issue with creating an entity, like putting a bus and showing the right panel, then load another scene, the right panel will still show the bus.
I think more generally the issue here is that the right panel should close when an entity is unselected (or removed), we have the same issue with aframe-inspector, when you press Esc, the entity unselect in the viewport but is still selected in the scene graph and showing properties in the right panel.

[vincentfretin]

Related to this, the blue select box stays instead of disappearing when you load an other scene.