PropertyStatus gets out of sync when: * Added subscribe to the DataContextChanged event * Added subscribe to the IsVisibleChanged event * Changed the GotoState to also cache the last image.  GotoState may be called before the control is part of the visual tree as Loaded is called at different timer in WPF and SL. WPF will cal Loaded as soon as the control is loaded and then IsVisibleChanged when the control gets visible. SL will call Loaded when the control gets visible and has no IsVisibleChanged event.  bugid: 926
PropertyStatus gets out of sync when:
* Added subscribe to the DataContextChanged event
* Added subscribe to the IsVisibleChanged event
* Changed the GotoState to also cache the last image. 
GotoState may be called before the control is part of the visual tree as Loaded is called at different timer in WPF and SL. WPF will cal Loaded as soon as the control is loaded and then IsVisibleChanged when the control gets visible. SL will call Loaded when the control gets visible and has no IsVisibleChanged event. 
bugid: 926


jonnybee/csla,JasonBock/csla,rockfordlhotka/csla,BrettJaner/csla,jonnybee/csla,JasonBock/csla,rockfordlhotka/csla,ronnymgm/csla-light,JasonBock/csla,MarimerLLC/csla,rockfordlhotka/csla,BrettJaner/csla,jonnybee/csla,ronnymgm/csla-light,MarimerLLC/csla,ronnymgm/csla-light,BrettJaner/csla,MarimerLLC/csla