Improvements for Widgets "Post Feed" and "Topic Feed"

Here are some suggestions / feature requests for the Post Feed and Topic Feed widgets. Some of them are direct feedback from our communities users:

• Show read/unread indicators in the feed, just as in the forums list
  We want to place those widgets on top of the forum overview page, so that users can easily see, what's new. But they complain that they can not see, if they have already read the topics/posts shown here since their last visit.

• Post Feed: Option to show only one (latest) post per topic.
  Right now the widget can show the latest posts overall. But if there is a very actively discussed topic, all the posts displayed may be from that one topic, which is not very helpful.

• Option for a more compact layout
  The widgets are quite nice, but the currently consume a lot of vertical space. So you can either show only a few or the widgets will fill the whole screen. It doesn't matter if they are placed in narrow columns or full width. The already adapt to that but in a way that it always uses much height. Maybe the preview text could be reduced in "compact view"

• Post Feed: Translation for Title is missing
  in "Topic feed" you can specify a Title fore every language used (see Screenshots). In the post feed that option is missing.

Post Feed: Only one language for custom title (may be that's a bug):

Topics Feed: Separate title per language