Close wxLogWindow automatically if it's the last remaining TLW.

Don't keep the application opened just because a log window is shown.

Closes #14775.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72749 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/logg.cpp

@@ -448,6 +448,9 @@ public:
     wxLogFrame(wxWindow *pParent, wxLogWindow *log, const wxString& szTitle);
     virtual ~wxLogFrame();
 
+    // Don't prevent the application from exiting if just this frame remains.
+    virtual bool ShouldPreventAppExit() const { return false; }
+
     // menu callbacks
     void OnClose(wxCommandEvent& event);
     void OnCloseWindow(wxCloseEvent& event);