autocomplete-css doesn't work with Smarty template engine.

[llagerlof]

I think this issue is because all css codeblocks must stay inside the Smarty's tag {literal} and {/literal}.

How to reproduce:

1. Create a page.htm and add the following code:

<style type="text/css">
{literal}
div {
    margin-left: 5mm;
    margin-right: 5mm;
    border: 1px solid blue;
    >> IF YOU TRY TO ADD SOMETHING HERE, THE AUTOCOMPLETE DOESN'T WORK.
}
{/literal}
</style>