Add wxDocument::Activate() method.

Make activating the first (and, in the vast majority of cases, the only) view
of the document easier.

Closes #15120.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73720 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/docview.h

@@ -86,6 +86,9 @@ public:
     bool GetDocumentSaved() const { return m_savedYet; }
     void SetDocumentSaved(bool saved = true) { m_savedYet = saved; }
 
+    // activate the first view of the document if any
+    void Activate();
+
     // return true if the document hasn't been modified since the last time it
     // was saved (implying that it returns false if it was never saved, even if
     // the document is not modified)
@@ -550,10 +553,6 @@ protected:
     // view and returns it then
     wxView *GetActiveView() const;
 
-    // activate the first view of the given document if any
-    void ActivateDocument(wxDocument *doc);
-
-
     int               m_defaultDocumentNameCounter;
     int               m_maxDocsOpen;
     wxList            m_docs;