more updates to children shortcode

CONTRIBUTING.md

@@ -73,6 +73,7 @@ related: # Creates links to specific internal and external content at the bottom
   - /path/to/related/article
   - https://external-link.com, This is an external link
 external_url: # Used in children shortcode type="list" for page links that are external
+list_image: # Image included with article descriptions in children type="articles" shortcode
 list_note: # Used in children shortcode type="list" to add a small note next to listed links
 ```
 
@@ -413,7 +414,8 @@ The following table shows which children types use which frontmatter properties:
 |:-----------    |:--------:|:----:|:---------:|
 | `list_title`   | ✓        | ✓    | ✓         |
 | `description`  | ✓        |      |           |
-| `external_url` |          | ✓    |           |
+| `external_url` | ✓        | ✓    |           |
+| `list_image`   | ✓        |      |           |
 | `list_note`    |          | ✓    |           |
 
 ### Inline icons

layouts/shortcodes/children.html

@@ -15,7 +15,10 @@
 {{ if eq $type "articles" }}
 
 	{{ range $pages.ByWeight }}
-		<h3><a href="{{ .RelPermalink }}" >{{ if .Params.list_title }}{{ .Params.list_title }}{{ else }}{{ .Title }}{{ end }}</a></h3>
+		{{ $title := cond ( isset .Params "list_title" ) .Params.list_title .Title }}
+		{{ $url := cond ( isset .Params "external_url" ) .Params.external_url .RelPermalink }}
+		{{ $target := cond ( isset .Params "external_url" ) "_blank" "" }}
+		<h3><a href="{{ $url }}" target="{{ $target }}">{{ $title }}</a></h3>
 		<p>
 			{{- if .Description }}{{- .Description | markdownify -}}
 			{{ else }}{{- .Summary | markdownify -}}
@@ -51,7 +54,7 @@
 	  {{ $url := cond ( isset .Params "external_url" ) .Params.external_url .RelPermalink }}
 		{{ $target := cond ( isset .Params "external_url" ) "_blank" "" }}
 		{{ $note := cond ( isset .Params "list_note" ) (print "<span class='list-note'>" .Params.list_note "</span>") "" }}
-		<li><a href="{{ $url }}">{{ $title }}</a> {{ $note | markdownify }}</li>
+		<li><a href="{{ $url }}" target="{{ $target }}">{{ $title }}</a> {{ $note | markdownify }}</li>
 	{{ end }}
 	<ul>