Bug 13618: Use Template::Stash::AutoEscaping to use the html filter

Bug 13618: Use Template::Stash::AutoEscaping to use the html filter

Test plan:
0/ sudo cpanm Template::Stash::AutoEscaping
1/ Verify don't reproduce the XSS issue described on bug 13609 and other
xss related bugs.
2/ Try to find some encoding issues (detail page, search results,
facets, etc.)

Signed-off-by: Signed-off-by: Joonas Kylmälä <j.kylmala@gmail.com>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com