Component: UIControlsTests
Build: javafx8u65b03
Platform: Mac
Is a regression: no
Platform-specific: yes, macos (10.9.5) only. Not applicable for macos 10.10 (no maximize button)

Steps to reproduce:
1. Run attached sample
2. Click "Maximize", text is set to "Maximized"
3. Click on "Maxmize" button again to restore window size.
Expected: text is set to "Not maximized" again
Actual: text is still "Maximized", property value is not changed.