Use border style consistently in the widgets sample

Use GetAttrs().m_defaultFlags everywhere when creating the widgets, it
was done for some but not all of them before, without any apparent
reason.

This should make setting various border styles work (for the widgets
supporting them).

samples/widgets/filepicker.cpp

@@ -90,9 +90,6 @@ protected:
     // restore the checkboxes state to the initial values
     void Reset();
 
-    // get the initial style for the picker of the given kind
-    long GetPickerStyle();
-
     // update filepicker radiobox
     void UpdateFilePickerMode();
 
@@ -223,17 +220,7 @@ void FilePickerWidgetsPage::CreatePicker()
 {
     delete m_filePicker;
 
-    // pass an empty string as initial file
-    m_filePicker = new wxFilePickerCtrl(this, PickerPage_File,
-                                        wxEmptyString,
-                                        wxT("Hello!"), wxT("*"),
-                                        wxDefaultPosition, wxDefaultSize,
-                                        GetPickerStyle());
-}
-
-long FilePickerWidgetsPage::GetPickerStyle()
-{
-    long style = 0;
+    long style = GetAttrs().m_defaultFlags;
 
     if ( m_chkFileTextCtrl->GetValue() )
         style |= wxFLP_USE_TEXTCTRL;
@@ -255,7 +242,12 @@ long FilePickerWidgetsPage::GetPickerStyle()
     else
         style |= wxFLP_SAVE;
 
-    return style;
+    // pass an empty string as initial file
+    m_filePicker = new wxFilePickerCtrl(this, PickerPage_File,
+                                        wxEmptyString,
+                                        wxT("Hello!"), wxT("*"),
+                                        wxDefaultPosition, wxDefaultSize,
+                                        style);
 }
 
 void FilePickerWidgetsPage::RecreatePicker()