Steps to reproduce:

1. Open Unity;
2. Create new project and scene;
3. Add tree gameobject (GameObject -> 3D Object -> Tree);
4. Resize Inspector tab and observe scalebars of Tree component.

Actual result:
Resizing Inspector tab hides tree creator's scalebars (see attached actual.png and gif video). That brings inconsistency with other Unity components (like, for example, Camera).

Expected result:
After resizing every scalebar of Tree component should be displayed.

Notes:
- Reproduces in 5.4.0b5, 5.4.0b4, 5.3.2f1, 5.3.1f1, 5.2.4f1;
- Reproduces for both OSX 10.11.3 and Windows 10.