Fixes for bugs 1122 and 1113

Several other issues were also fixed (hopefully ;-)).

This is a major change to accelerator handling and keyboard
capturing.  Menu shortcuts, non-menu commands, label editing,
navigation, and basically anything else were you might use
the keyboard should be thoroughly tested.

src/Project.h

@@ -298,8 +298,8 @@ class AUDACITY_DLL_API AudacityProject:  public wxFrame,
    void OnODTaskUpdate(wxCommandEvent & event);
    void OnODTaskComplete(wxCommandEvent & event);
    void OnTrackListUpdated(wxCommandEvent & event);
+
    bool HandleKeyDown(wxKeyEvent & event);
-   bool HandleChar(wxKeyEvent & event);
    bool HandleKeyUp(wxKeyEvent & event);
 
    void HandleResize();
@@ -661,6 +661,9 @@ class AUDACITY_DLL_API AudacityProject:  public wxFrame,
    // Keyboard capture
    wxWindow *mKeyboardCaptureHandler;
 
+   // CommandManager needs to use private methods
+   friend class CommandManager;
+
    DECLARE_EVENT_TABLE()
 };