Color picker eye dropper preview shows the wrong area being selected with the cursor. Though when clicking the correct colour is selected.

Steps to reproduce:
1. Open attached project
2. Select "color me" sprite, or anything that has a color selection
3. Open color picker, select eye dropper
4. Observe how the preview does not show the correct placement of the cursor
5. Going upwards/left may result in preview showing some out of bounds territory with random pixels

Expected result: Eye dropper preview shows correct area being selected with the tool
Actual result: Usually the actual area the preview shows is somewhere up and to the left. If you move to the edge of the screen, the preview goes beyond screen and shows garbage pixels

Reproduced in 5.6.0f3, 2017.1.b1
Does not reproduce in 5.5.2f1, 5.5.3f1

Notes: Even though it does not reproduce on 5.5.2f1 you can still see the 'beyond' area when going to the left side of the screen
5.6.0b1, 5.6.0f1, 5.6.0f2 eye dropper just straight up crashes unity