Use boost::nowide directly from boost (#9037)

* Use `boost::nowide` directly from boost

Cherry-picked from prusa3d/PrusaSlicer@bffa3f8578

Co-authored-by: tamasmeszaros <meszaros.q@gmail.com>

* Replaced all occurrences of boost::nowide::narrow for wxStrings with into_u8

Cherry-picked from prusa3d/PrusaSlicer@8d6497297a

Co-authored-by: tamasmeszaros <meszaros.q@gmail.com>

* Fix flatpak build

src/libslic3r/AppConfig.cpp

@@ -15,7 +15,6 @@
 
 #include <boost/filesystem/path.hpp>
 #include <boost/filesystem/operations.hpp>
-#include <boost/nowide/cenv.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/property_tree/ini_parser.hpp>
 #include <boost/property_tree/ptree_fwd.hpp>

src/libslic3r/CMakeLists.txt

@@ -560,7 +560,6 @@ target_link_libraries(libslic3r
     miniz
     boost_libs
     clipper
-    nowide
     ${EXPAT_LIBRARIES}
     glu-libtess
     qhull

src/libslic3r/Config.cpp

@@ -19,7 +19,7 @@
 #include <boost/foreach.hpp>
 #include <boost/lexical_cast.hpp>
 #include <boost/log/trivial.hpp>
-#include <boost/nowide/cenv.hpp>
+#include <boost/nowide/cstdlib.hpp>
 #include <boost/nowide/iostream.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/property_tree/ini_parser.hpp>

src/libslic3r/GCode/PostProcessor.cpp

@@ -8,8 +8,8 @@
 #include <boost/log/trivial.hpp>
 #include <boost/format.hpp>
 #include <boost/filesystem.hpp>
+#include <boost/nowide/cstdlib.hpp>
 #include <boost/nowide/convert.hpp>
-#include <boost/nowide/cenv.hpp>
 #include <boost/nowide/fstream.hpp>
 
 // BBS

src/libslic3r/Preset.cpp

@@ -34,7 +34,6 @@
 //BBS: add regex
 #include <boost/algorithm/string/regex.hpp>
 
-#include <boost/nowide/cenv.hpp>
 #include <boost/nowide/convert.hpp>
 #include <boost/nowide/cstdio.hpp>
 #include <boost/nowide/fstream.hpp>

src/libslic3r/PresetBundle.cpp

@@ -16,7 +16,6 @@
 #include <boost/algorithm/clamp.hpp>
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/range/adaptor/transformed.hpp>
-#include <boost/nowide/cenv.hpp>
 #include <boost/nowide/cstdio.hpp>
 #include <boost/nowide/fstream.hpp>
 #include <boost/property_tree/ini_parser.hpp>

src/libslic3r/pchheader.hpp

@@ -81,12 +81,11 @@
 #include <boost/log/expressions.hpp>
 #include <boost/log/trivial.hpp>
 #include <boost/multi_array.hpp>
-#include <boost/nowide/cenv.hpp>
 #include <boost/nowide/convert.hpp>
 #include <boost/nowide/cstdio.hpp>
 #include <boost/nowide/cstdlib.hpp>
 #include <boost/nowide/fstream.hpp>
-#include <boost/nowide/integration/filesystem.hpp>
+#include <boost/nowide/filesystem.hpp>
 #include <boost/nowide/iostream.hpp>
 
 // boost/property_tree/json_parser/detail/parser.hpp includes boost/bind.hpp, which is deprecated.