Creating a new scene using Project window (instead of File -> New Scene) changes Auto mode toggle button and affects the lighting setting of previous scene.

Steps for reproduction:

1) Create a New Project
2) Create a new scene through File -> New Scene or `Ctrl + N`
3) Save the scene (e.g. name it `Scene1`)
4) Disable Auto mode and manually generate the lighting
5) Right click in Project window, go to Create -> Scene
6) Press enter two times, this creates a scene called `New Scene` in Project window.
7) Open previous scene (`Scene1`)
9) Observe that Auto mode is magically enabled and triggers a re-bake of the scene.

Notes:
- Not a regression, reproduced in 5.4.5p2, 5.5.4f1, 5.6.0f3, 5.6.1p2, 2017.1.0b9, 2017.2.0a3
- Workaround is to create a new scene through (File -> New Scene)
- Creating a new scene in Project window shouldn't affect the lighting settings of another scene in the project