Fix the backspace key not working on the bzadmin Curses menu.

Author: blast007

src/bzadmin/CursesMenu.cxx

@@ -272,6 +272,7 @@ bool BZDBCMItem::handleKey(int c, std::string& str, CursesMenu&)
     case KEY_BACKSPACE:
     case KEY_DC:
     case 127:
+    case 8:
         editString = (editString.size() > 0 ?
                       editString.substr(0, editString.size() - 1) : editString);
         break;