avoid including builtin-defun-decls.h unless needed Also audit all GUI files to ensure that any built-in DEFUN functions are called from the interpreter thread using an interpreter_event signal and that there are no lurking calls to eval or feval now. * file-editor-tab.cc: Include builtin-defun-decls.h here, not in file-editor-tab.h * files-dock-widget.cc, qt-application.cc: Don't include builtin-defun-decls.h. * main-window.cc (main_window::handle_open_any_request): Use interpreter::feval instead of global feval function.