Other: C++ code cleanup

internal/frontend/bridge-gui/Version.h.in

@@ -1,6 +1,24 @@
-#ifndef VERSION_H
-#define VERSION_H
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+
+#ifndef BRIDGE_GUI_VERSION_H
+#define BRIDGE_GUI_VERSION_H
 
 #define PROJECT_VER  "@BRIDGE_APP_VERSION@"
 
-#endif // VERSION_H
+#endif // BRIDGE_GUI_VERSION_H