Stop using Fn keys as accelerators in the widgets sample

This prevented them from being used for their usual purposes, e.g. F4
didn't open the combobox dropdown under MSW, which was annoying as it
made testing more difficult.

Just stop using the accelerators, especially as they could be only used
for less than half of pages anyhow.

samples/widgets/widgets.cpp

@@ -541,7 +541,7 @@ void WidgetsFrame::InitBook()
     wxArrayString labels[MAX_PAGES];
 
     wxMenu *menuPages = new wxMenu;
-    unsigned int nPage = 0, nFKey = 0;
+    unsigned int nPage = 0;
     int cat, imageId = 1;
 
     // we need to first create all pages and only then add them to the book
@@ -579,16 +579,9 @@ void WidgetsFrame::InitBook()
             labels[cat].Add(info->GetLabel());
             if ( cat == ALL_PAGE )
             {
-                wxString radioLabel(info->GetLabel());
-                nFKey++;
-                if ( nFKey <= 12 )
-                {
-                    radioLabel << wxT("\tF" ) << nFKey;
-                }
-
                 menuPages->AppendRadioItem(
                             Widgets_GoToPage + nPage,
-                            radioLabel
+                            info->GetLabel()
                            );
 #if !USE_TREEBOOK
                 // consider only for book in book architecture