Using a custom header can break table header arrows

[aperezdc]

The default template.html contains a <meta> tag as follows:

<meta http-equiv="content-type" content="text/html; charset=utf-8" />

This <meta> tag properly makes browsers interpret the entity reference codes for the sort arrows in the table headers as Unicode. Now, if a custom header is configured, and such a tag is not present (or the charset= is something else than utf-8), the sorting arrows won't show properly.

As an alternative, ngx-fancydex could generate the corresponding HTTP header instead, and the <meta> tag could be removed from the template. That could pose a problem when non custom headers or footers are not UTF-8, though this seems like a reasonable requirement for most cases.

Another option might be using the ↑ and ↓ HTML entity references, which should render properly independently of the charset (hopefully).