MSVC 2015 and 2017 projects: Add /utf-8 switch
Makefile.griffin: Add -utf-8 switch to MSVC 2015 builds
Makefile.msvc: Add -utf-8 switch to MSVC 2017 builds
intl/msg_hash files: Added BOM and MSVC 2010-2013 pragmas
menu_cbs.c: Replace Euro character with raw bytes
menu_osk_utf8_pages.h: Replace pragma with MSVC 2010-2013 version range
shaderparamsdialog.cpp: Add BOM and MSVC 2010-2013 pragma