fix(compression): remove 'safe' compression from all resources

This is a merge from commit 9a7357472fbdec66a809fe6cfe7f8493e892299e at master for the 1.9.X branch.

Problem: it does not work, at least not with the buildout config that is included with the package. Focusing just on the javascript:
- the compression in portal_javascripts stays 'safe' instead of 'none'
- the resource is added to the bottom, instead of just after `++resource++plone.app.jquery.js`, which is there right at the top.
- the bundle stays 'default' instead of 'jqueryui'. Changing this to 'jquery' as some of the existing resources have, has no effect.
Technically there is no regression, but no positive effect either, except probably the removal of the `pack` call for the partial resources that were already compressed.

If someone knows how to get this correctly, that would be good. Maybe this just requires an earlier Plone version or an earlier plone.app.jquery version.