added extra features

[Louisgcr]

Added extra features to you point cloud annotation tool.

• extra camera views
• able to toggle full screen those view
• added a real time update of box details in message box
• reduce intensity point cloud
• reduce opacity of box

[springzfx]

Thanks for your contribution, I will handle this when available.

[Louisgcr]

There are currently some issues, but nothing deal breaking i think. I will try to work on it when i have more time.
Issues:

1. When an actor is selected, to unselect it, you will need to click on another renderer
2. In select point cloud mode, if an actor is selected you will need to unselect it if not the label does not work.
3. Toggle fullscreen using ctrl-z is a little fiddly, do not toggle too quickly.