Make wxWS_EX_VALIDATE_RECURSIVELY default (and only) behaviour

In practice, almost everybody using validators also seems to use this style,
so make it the default (this hadn't been done when it was originally
introduced because of compatibility concerns, but now, 15+ years later, it's
probably safe enough to change this).

samples/dialogs/dialogs.h

@@ -301,12 +301,34 @@ private:
 
 
 #if USE_SETTINGS_DIALOG
+
+// Struct containing properties edited by SettingsDialog.
+struct SettingsData
+{
+    SettingsData() :
+        m_loadLastOnStartup(false),
+        m_autoSaveInterval(1),
+        m_showToolTips(false),
+        m_applyTo(0),
+        m_bgStyle(0),
+        m_titleFontSize(10)
+    {
+    }
+
+    bool m_loadLastOnStartup;
+    int m_autoSaveInterval;
+    bool m_showToolTips;
+    int m_applyTo;
+    int m_bgStyle;
+    int m_titleFontSize;
+};
+
 // Property sheet dialog
 class SettingsDialog: public wxPropertySheetDialog
 {
     wxDECLARE_CLASS(SettingsDialog);
 public:
-    SettingsDialog(wxWindow* parent, int dialogType);
+    SettingsDialog(wxWindow* parent, SettingsData& settingsData, int dialogType);
     ~SettingsDialog();
 
     wxPanel* CreateGeneralSettingsPage(wxWindow* parent);
@@ -327,6 +349,8 @@ protected:
 
     wxImageList*    m_imageList;
 
+    SettingsData& m_settingsData;
+
     wxDECLARE_EVENT_TABLE();
 };
 
@@ -509,6 +533,10 @@ private:
               *m_infoBarAdvanced;
 #endif // wxUSE_INFOBAR
 
+#if USE_SETTINGS_DIALOG
+    SettingsData m_settingsData;
+#endif // USE_SETTINGS_DIALOG
+
     wxDECLARE_EVENT_TABLE();
 };