Tweak the default wxApp::GetAppDisplayName() logic.

Don't capitalize the app name if it had been explicitly set with SetAppName()
as this can result in unexpectedly wrong value. Do capitalize the program name
which is used as app name by default and don't store the program name in
m_appName to be able to distinguish between the two cases.

Closes #11165.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61821 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/app.h

@@ -136,22 +136,17 @@ public:
     //     be argv[0]
 
         // set/get the application name
-    wxString GetAppName() const
-    {
-        return m_appName.empty() ? m_className : m_appName;
-    }
+    wxString GetAppName() const;
     void SetAppName(const wxString& name) { m_appName = name; }
 
         // set/get the application display name: the display name is the name
         // shown to the user in titles, reports, etc while the app name is
         // used for paths, config, and other places the user doesn't see
         //
-        // so the app name could be myapp while display name could be "My App"
-    wxString GetAppDisplayName() const
-    {
-        return m_appDisplayName.empty() ? GetAppName().Capitalize()
-                                        : m_appDisplayName;
-    }
+        // by default the display name is the same as app name or a capitalized
+        // version of the program if app name was not set neither but it's
+        // usually better to set it explicitly to something nicer
+    wxString GetAppDisplayName() const;
 
     void SetAppDisplayName(const wxString& name) { m_appDisplayName = name; }