How to reproduce:
1. Create a new 2D Project
2. In the Hierarchy Window create a new Tilemap
3. Open the Tile Pallete Window and create a new Pallete
4. Add any sprite to it and close the Window
5. Reopen the window and click on any tile
6. Observe the Scene View

Expected result: Selecting any of the tiles in the Tile Pallete do not shift the Camera
Actual result: Selecting any tile without selecting any of the Pallete tools shifts the camera to the 0.0.0 position

Reproduced in: 2018.3.0a8, 2018.2.3f1, 2018.1.9f1