Consistenly have modelines for all templates

Change-Id: I9ef62c5cb882c323d134f87ea50202c7b40bb6fb

TEMPLATE.SOURCECODE.HEADER

@@ -78,6 +78,7 @@ For XML / .component:
 
 For C/C++/Java/IDL etc.
 
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /*
  * This file is part of the LibreOffice project.
  *
@@ -95,9 +96,12 @@ For C/C++/Java/IDL etc.
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
+...
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
 
 For makefiles, perl, scripts etc.
 
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
 #
 # This file is part of the LibreOffice project.
 #
@@ -115,9 +119,12 @@ For makefiles, perl, scripts etc.
 #   except in compliance with the License. You may obtain a copy of
 #   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 #
+...
+# vim: set noet sw=4 ts=4:
 
 For XML / .component:
 
+<?xml version="1.0" encoding="UTF-8"?>
 <!--
  * This file is part of the LibreOffice project.
  *