Change link preview to be more space efficient with picture and text.

Addresses Issue #35

lib/controls/timeline/link_preview_control.dart

@@ -12,7 +12,6 @@ class LinkPreviewControl extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    const width = 128.0;
     return Padding(
       padding: const EdgeInsets.only(left: 8.0, right: 8.0),
       child: Container(
@@ -23,17 +22,22 @@ class LinkPreviewControl extends StatelessWidget {
           onTap: () async {
             await openUrlStringInSystembrowser(context, preview.link, 'link');
           },
-          child: Row(
+          child: Column(
             children: [
-              SizedBox(
-                width: width,
-                child: CachedNetworkImage(imageUrl: preview.selectedImageUrl),
-              ),
-              Expanded(
-                child: ListTile(
-                    title: Text(preview.title),
-                    subtitle: Text(preview.description.truncate(length: 128))),
-              ),
+              CachedNetworkImage(imageUrl: preview.selectedImageUrl),
+              ListTile(
+                  title: Text(preview.title,
+                      style: const TextStyle(fontWeight: FontWeight.bold)),
+                  subtitle: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(
+                        preview.siteName,
+                        style: const TextStyle(fontStyle: FontStyle.italic),
+                      ),
+                      Text(preview.description.truncate(length: 128)),
+                    ],
+                  )),
             ],
           ),
         ),