Improve post image loading size

lib/ui/tiles/post_tile.dart

@@ -205,6 +205,7 @@ class _PostTileState extends State<PostTile> {
       url: widget.post.fileURL,
       allowFullScreen: true,
       roundedEdges: false,
+      loadingHeight: 150,
     );
   }
 

lib/ui/widgets/network_image_widget.dart

@@ -14,6 +14,7 @@ class NetworkImageWidget extends StatelessWidget {
   final bool roundedEdges;
   final double width;
   final double height;
+  final double loadingHeight;
 
   const NetworkImageWidget({
     Key key,
@@ -22,10 +23,15 @@ class NetworkImageWidget extends StatelessWidget {
     this.width,
     this.height,
     this.roundedEdges = true,
+    this.loadingHeight,
   })  : assert(url != null),
         assert(allowFullScreen != null),
         super(key: key);
 
+  double get _loadingHeight => loadingHeight != null ? loadingHeight : height;
+
+  double get _loadingWidth => width;
+
   @override
   Widget build(BuildContext context) {
     return Material(
@@ -41,16 +47,16 @@ class NetworkImageWidget extends StatelessWidget {
           height: height,
           fit: BoxFit.cover,
           placeholder: (c, s) => Container(
-                width: width,
+                width: _loadingWidth,
-                height: height,
+                height: _loadingHeight,
                 color: Colors.lightBlueAccent,
                 child: Center(
                   child: CircularProgressIndicator(),
                 ),
               ),
           errorWidget: (c, s, o) => Container(
-                width: width,
+                width: _loadingWidth,
-                height: height,
+                height: _loadingHeight,
                 color: Colors.red,
                 child: Center(
                   child: Icon(