Speak all symbols when moving by words (#11779) (#11856)
Navigation by word is inconsistent among different editors.
This might lead to different symbol announcements, or opening and closing symbols not announced consistently.
### Description of how this pull request fixes the issue:
- Add a new "symbolLevelWord" key in the "speech" config category, setting the symbol level to use when reviewing by word.
Default: All
- Add a new constant in `characterProcessing`: `SYMLVL_UNCHANGED` = -1
- The Settings UI and an unassigned global command allow to toggle between "All" and "Unchanged"
Co-authored-by: buddsean <sean@nvaccess.org>
