use c++17 as standard again

Contribute to NP-202

profiles/cura.jinja

@@ -3,9 +3,16 @@ include(default)
 [build_requires]
 
 [settings]
-compiler.cppstd=20
+compiler.cppstd=17
-nest2d:compiler.cppstd=17
+curaengine:compiler.cppstd=20
-pynest2d:compiler.cppstd=17
+curaengine*:compiler.cppstd=20
+curaengine_plugin_infill_generate:compiler.cppstd=20
+curaengine_plugin_gradual_flow:compiler.cppstd=20
+curaengine_grpc_definitions:compiler.cppstd=20
+scripta:compiler.cppstd=20
+umspatial*:compiler.cppstd=20
+dulcificum:compiler.cppstd=20
+cura_settings:compiler.cppstd=20
 
 {% if compiler == 'gcc' %}compiler.libcxx=libstdc++11
 {% elif compiler == 'apple-clang' %}compiler.libcxx=libc++