New Gizmos / Improve Item Gizmos Behaviour

[KaiDevvy]

This change adds Gizmos to the following components:

• Wave Spawner
• Ocean
• Tube Builder
• Rope

In addition, it changes the behavior of Item gizmos to only display when the component's object is a part of the editor's selection. Doing so means the scene view won't be cluttered with the gizmos of every component when selecting a parent object.

You can see all of these new gizmos and the change to item components in the preview videos below.

New Gizmos

https://user-images.githubusercontent.com/18744053/186486649-6439ed8b-af9a-4b42-9ba5-c817d3ac06ec.mp4

Item Gizmos

https://user-images.githubusercontent.com/18744053/186486705-2d2c80f4-ce7c-4a05-95f0-a65862b99eef.mp4