Fix restoring of wxAuiManager::m_has_maximized when restoring perspective.

If the perspective being loaded contains a maximized pane, set the
m_has_maximized flag to true. Otherwise the flag and the effective pane state
was out of sync resulting in several problems in the UI behaviour.

Closes #12527.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67744 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/aui/framemanager.cpp

@@ -1589,6 +1589,7 @@ bool wxAuiManager::LoadPerspective(const wxString& layout, bool update)
     input.Replace(wxT("\\|"), wxT("\a"));
     input.Replace(wxT("\\;"), wxT("\b"));
 
+    m_has_maximized = false;
     while (1)
     {
         wxAuiPaneInfo pane;
@@ -1631,6 +1632,9 @@ bool wxAuiManager::LoadPerspective(const wxString& layout, bool update)
 
         LoadPaneInfo(pane_part, pane);
 
+        if ( pane.IsMaximized() )
+            m_has_maximized = true;
+
         wxAuiPaneInfo& p = GetPane(pane.name);
         if (!p.IsOk())
         {