Qt citydlg.cpp: bold() header not marked for doxygen
Qt-client's citydlg.cpp has "Qstring bold()" function. It's function header does not have "**//**" -marking.
Also helpdlg.cpp has some methods lacking the doxygen marking.
Attached patch also removes declaration of 'bold()' from the header, as it's not used outside the module and namespace-wise it's better not to have so generic name reserved.