Ask before leaving questionnaire page with unsaved answers

[goneall]

If a user has answers, they should be prompted prior to leaving the page so they know the answers are not saved.

[goneall]

Here's a link to an approach for this type of message: https://stackoverflow.com/questions/7317273/warn-user-before-leaving-web-page-with-unsaved-changes

[goneall]

For the prompt, I suggest the following wording:

You have unsaved answers. Do you really want to leave?

@brandelune @theopenchainproject Let me know if you agree with the above wording. If you can attach or paste a Japanese translation of the agreed to string, we can include it in the fix.

[shanecoughlan]

Agreed! One suggested change to the wording:

You have unsaved answers. Do you really want to leave? You can save your answers at the bottom of this page.