Removed the draft message in favor for a consistent draft folder facility

- reworked sbr/m_draft.c (of course)
- removed the -draftfolder/-draftmessage/-nodraftfolder switches
- removed the -draft switch from anno and refile
- no more need to question on existing draft message - yay!
Everything is more consistent now. Cornercases went away. :-)

(Also fixed the switch numbering, as already done for other files earlier.)