Fix the following cases:
- two names for same ID in sd/inc/app.hrc. Two ID defined.
- ID defined in include/sfx2/sfxsids.hrc and redefined in
  sd/inc/app.hrc. Only the sfx2 ID is kept
- ID defined in include/svx/svxids.hrc and redefined in
  sd/inc/app.hrc. Only the svx ID is kept

Change-Id: I21c7c25cb6db3c43ea2f9aac5aac75fabe61eaf0
Reviewed-on: https://gerrit.libreoffice.org/16209Reviewed-by: Philippe Jung <phil.jung@free.fr>
Tested-by: Philippe Jung <phil.jung@free.fr>