Fix accent url

[fpellet]

This fixes a bug and improves urls for SEO.

Currently, if a question has accents in the title, then there are % in the url.
This creates a technical error when an unauthenticated user tries to answer this question.
When he clicks on answer, it asks him to identify himself, then redirects him to the question, but displays an “HTTP Status 400 - Bad Request” error.

I also did the same thing for the profile.

PR Checklist

• I have read the CONTRIBUTING document.
• I checked to ensure there aren't other open Pull Requests or issues on the same topic?
• I have updated the documentation accordingly (if necessary at all).
• My code follows the code style of this project and does not alter whitespace formatting.
• My pull request does not introduce features which are already implemented in Scoold Pro.

Large PRs with changes to more than 20 files are strongly discouraged but will be reviewed.

[albogdano]

Merci, Florent! I didn't know about that error.