Misc editor actions

[t3kt]

For things that aren't large enough to warrant their own issues.

• [x] Combine float fields with floatToVector
• [x] Add functionGraphRender
• [x] Lock primary menu on selected ROP
• [x] Combine fields with mixFields
• [x] Add cameraTransform/lightTransform
• [ ] Convert a combine to an arrange
• [ ] Linked camera / light from camera / light COMP