wmaker: improve the documentation for the command-line options
There were 2 options that were not documented at all, which are now listed
in the 'wmaker --help';
The man page have been updated according to the 'check-cmdline-opts' script
feedback, including:
- adding 2 options that were missing (global_def_path, no-drawer);
- removed 2 options that do not exist anymore (no-cpp, create-stdcmap);
- sorting the options, to make them easier to search for.
In addition, took opportunity to:
- remove the double description for 'visual-id';
- improve a number of descriptions to make them clearer;
- fix minor stuff (typo, spaces at end of lines).
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>