Fix saving edited property value when wxPG property is in the 'invalid value' state.

When wxPGProperty is loosing focus in 'invalid value' state its pending value should be stored before resetting property to 'normal' state because this operation (wxPG::OnValidationFailureReset) also resets pending value.

This is the backport of r77887.
See #16587.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@78508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/propgrid.cpp

@@ -3341,9 +3341,6 @@ bool wxPropertyGrid::DoPropertyChanged( wxPGProperty* p, unsigned int selFlags )
 
     m_pState->m_anyModified = 1;
 
-    // If property's value is being changed, assume it is valid
-    OnValidationFailureReset(selected);
-
     // Maybe need to update control
     wxASSERT( m_chgInfo_changedProperty != NULL );
 
@@ -3351,6 +3348,9 @@ bool wxPropertyGrid::DoPropertyChanged( wxPGProperty* p, unsigned int selFlags )
     wxPGProperty* changedProperty = m_chgInfo_changedProperty;
     wxVariant value = m_chgInfo_pendingValue;
 
+    // If property's value is being changed, assume it is valid
+    OnValidationFailureReset(selected);
+
     wxPGProperty* topPaintedProperty = changedProperty;
 
     while ( !topPaintedProperty->IsCategory() &&