[win32] AboutTab: Reorder initialization to match variable order.

src/win32/config/AboutTab.cpp: In constructor ‘AboutTabPrivate::AboutTabPrivate()’:
src/win32/config/AboutTab.cpp:159:22: warning: ‘AboutTabPrivate::hRichEdit’ will be initialized after [-Wreorder]
  159 |                 HWND hRichEdit;
      |                      ^~~~~~~~~
src/win32/config/AboutTab.cpp:115:22: warning:   ‘bool AboutTabPrivate::bUseFriendlyLinks’ [-Wreorder]
  115 |                 bool bUseFriendlyLinks;
      |                      ^~~~~~~~~~~~~~~~~
src/win32/config/AboutTab.cpp:196:1: warning:   when initialized here [-Wreorder]
  196 | AboutTabPrivate::AboutTabPrivate()
      | ^~~~~~~~~~~~~~~

src/win32/config/AboutTab.cpp

@@ -197,8 +197,8 @@ AboutTabPrivate::AboutTabPrivate()
 	: hPropSheetPage(nullptr)
 	, hWndPropSheet(nullptr)
 	, hFontBold(nullptr)
-	, hRichEdit(nullptr)
 	, bUseFriendlyLinks(false)
+	, hRichEdit(nullptr)
 {
 	memset(&rtfCtx, 0, sizeof(rtfCtx));