[DOCX] Remove Settings from existing document

[rvanlaak]

We'd like to remove two settings from a docx file, so the spelling and grammar check are on always. What about improving Setting so this becomes possible more easy?

Settings.HideSpellingErrors
https://msdn.microsoft.com/en-us/library/documentformat.openxml.wordprocessing.settings.hidespellingerrors(v=office.14).aspx

Settings.HideGrammaticalErrors
https://msdn.microsoft.com/en-us/library/documentformat.openxml.wordprocessing.settings.hidegrammaticalerrors(v=office.14).aspx