Peter Meier
9eab404240
The post_overview block kept rendering its <h3> headline + the
"all posts" footer link even when both `postsResolved` was empty
and `text` was unset, leaving a heading with nothing under it on
pages like /mediathek that include the block defensively.
Wrap the whole render in `{#if hasContent}` so empty overviews
disappear; the heading reappears as soon as posts or intro text
are present.