Bug 11322: rscrub bad data before storing suggestions in the DB

Bug 11322: rscrub bad data before storing suggestions in the DB

1/ In the public interface, add a suggestion containing html
2/ Save, notice the html is rendered (or if you have the other patches
is displayed)
3/ Apply this paget
4/ Add another suggestion
5/ Notice the html is stripped

Signed-off-by: David Cook <dcook@prosentient.com.au>
Works as described.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 48b339980e20bdefb21141d537c283d15e267d93)
Signed-off-by: Fridolin SOMERS <fridolin.somers@biblibre.com>