wxTextEntry::SetMargins(), GetMargins() - implemented on wxMSW and wxGTK (GTK+ 2.10+); also added similar functions into wxComboCtrl, deprecated old indent-functions; wxPropertyGrid modified to use the new functionality

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61834 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/textentry.h

@@ -76,6 +76,10 @@ protected:
     };
     virtual void DoSetSelection(long from, long to, int flags = SetSel_Scroll);
 
+    // margins functions
+    virtual bool DoSetMargins(const wxPoint& pt);
+    virtual wxPoint DoGetMargins() const;
+
 private:
     // implement this to return the HWND of the EDIT control
     virtual WXHWND GetEditHWND() const = 0;