Adds user dictionary file manager, so the user can add/remove additional text files to be used as user dictionaries.
Performance improvements, for RapidSpellAsYouType with RichTextBox and TextBox controls.
Improves user dictionary performance.
Adds MaximumNumberOfErrorsToHighlight property to RapidSpellAsYouType, allows a limit to be imposed on the number of errors underlined, to preserve UI performance.