[REGEDIT] Deduplication and other formatting changes (#7193)

- Deduplicates unused IDC_REGEDIT MENU vs. actually used IDR_REGEDIT_MENU
- shrinks the binary size, GCC8.4.0dbg build shrinks from 1.052.672 -> 1.049.600 bytes
- that also solves a few FIXME's, e.g. in hu-HU, pl-PL, sl-SI, sq-AL, tr-TR, uk-UA
- translates the help-popup string in th-TH.rc
- slightly tweak some headers to be a bit closer to newstyle without going all the way
- also link to LPGL2.1+ in the source files to reduce the wall-of-text, also some other whitespace tweaks in those, but no functional change
- security.c: vertical-compactness-whitespace-changes aim to get HeapAlloc closer to HeapFree
- id-ID.rc: "&Data nilai" and "&Nama nilai" does exist in 4 dialogs, Harmonize them
- pt-PT.rc: add 2 missing accels in IDD_EDIT_STRING
- edit.c: 3x ARRAY_SIZE
- the most review-worthy change in the actual .h/.c files is clb.c the change from ClbWndClass.hInstance = hinstDLL, ClbWndClass.hIcon = NULL; to ClbWndClass.hInstance = hinstDLL; ClbWndClass.hIcon = NULL;
- clb.c the stripped INT_PTR-cast for EndDialog() was Co-authored-by: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>

base/applications/regedit/error.c

@@ -3,20 +3,7 @@
  *
  * Copyright (C) 2010 Adam Kachwalla <geekdundee@gmail.com>
  * Copyright (C) 2012 Hermès Bélusca - Maïto <hermes.belusca@sfr.fr>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * LICENSE: LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
  */
 
 #include "regedit.h"