Fix many bugs with the Symbols menu (when run with -d argument).

The Symbols menu is now fully useable.
A much more complete dsy file is included, called combined.dsy.
Generate the Symbols then use the combined.dsy file to identify far more functions.
The ideal way (at least for now) to handle this is to make these counts part of the class and then have getters for said values and query them from the UI code and display an appropriate dialog. That or have out parameter, or a returned tuple, anything other than a PanicAlert. Using a PanicAlert for something that isn't panic-worthy is bad practice. These counts would of course be cleared when a new map is loaded.