fix sending indicator

lib/src/message_widget.dart

@@ -208,8 +208,8 @@ class _MessageWidgetState extends State<MessageWidget> {
   @override
   Widget build(BuildContext context) {
     var leftPadding = widget.showUserAvatar != DisplayWidget.gone
-        ? widget.messageTheme.avatarTheme.constraints.maxWidth + 24.0
-        : 16.0;
+        ? widget.messageTheme.avatarTheme.constraints.maxWidth + 16.0
+        : 6.0;
     return Portal(
       child: Padding(
         padding: widget.padding ?? EdgeInsets.all(8),
@@ -232,15 +232,6 @@ class _MessageWidgetState extends State<MessageWidget> {
                       crossAxisAlignment: CrossAxisAlignment.end,
                       mainAxisSize: MainAxisSize.min,
                       children: <Widget>[
-                        if (widget.showSendingIndicator == DisplayWidget.show)
-                          _buildSendingIndicator(),
-                        SizedBox(
-                          width: 2,
-                        ),
-                        if (widget.showSendingIndicator == DisplayWidget.hide)
-                          SizedBox(
-                            width: 8,
-                          ),
                         if (widget.showUserAvatar == DisplayWidget.show)
                           _buildUserAvatar(),
                         SizedBox(