Use underscores instead of spaces for all internal names. And renamed some script functions at the same time.

* cannocial_name_form now outputs "_", where it used to use " "
* this simplifies reflectio and scripting code, because now C++ names are also MSE internal names
* added 'caption' property to fields. This is used instead of the name in NativeLookEditor, since the latter will now contain underscores.
* renamed text related script functions for consistency, since we were touching that part of the code anyway.

src/data/field/information.cpp

@@ -63,7 +63,7 @@ String InfoValue::toString() const {
   return value;
 }
 bool InfoValue::update(Context& ctx) {
-  if (value.empty()) value = field().name;
+  if (value.empty()) value = field().caption;
   bool change = field().script.invokeOn(ctx, value);
   Value::update(ctx);
   return change;