Textedit / Spell Checker: Add to dictionary

End users can now add their own words to the Textedit / Spell Checker dictionary.

End users can now add their own words to the dictionary when using spell checking.

Note:

Words are not added to the dictionary file itself; a custom words file will be created in %GDCDIR%/etc (named custom_xxx.dic where xxx is the original dic file). The current user must have write access to %GDCDIR%/etc directory. You can remove (or edit) this file to remove (or change) the custom word list.
Dictionary loading has been reviewed: in 2.2x, each TextEdit loaded its own spell checker. Spell checkers are now shared between TextEdits during the GDC life time, which means that once a spell checker is loaded, it can be immediately used by another textedit without the delay due to loading. A dictionary is identified by the pair dic file / affix file.