Disable execution of eval in jQuery. We do require an allowed eval CSP
configuration at the moment for handlebars et al. But for jQuery there is
not much of a reason to execute JavaScript directly via eval.

This thus mitigates some unexpected XSS vectors. As example try to insert
`$('.fileinfo').html('<a href="asd"><script>alert(1)</script></a>');`
with and without this patch in your browsers JS console when the file list
is opened.

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>