fix reaction ui for messages with attachment

lib/src/message_widget.dart

@@ -227,10 +227,17 @@ class _MessageWidgetState extends State<MessageWidget>
           widget.message.reactionCounts?.isNotEmpty == true ? 2.0 : 0.0;
       column.children.addAll(
         <Widget>[
+          IntrinsicWidth(
+            child: Column(
+              crossAxisAlignment: isMyMessage
+                  ? CrossAxisAlignment.end
+                  : CrossAxisAlignment.start,
+              children: <Widget>[
                 Align(
                   child: _buildReactions(isMyMessage),
-            alignment:
+                  alignment: isMyMessage
-                isMyMessage ? Alignment.centerLeft : Alignment.centerRight,
+                      ? Alignment.centerLeft
+                      : Alignment.centerRight,
                 ),
                 Stack(
                   overflow: Overflow.visible,
@@ -253,10 +260,12 @@ class _MessageWidgetState extends State<MessageWidget>
                       child: AnimatedContainer(
                         duration: Duration(milliseconds: 300),
                         margin: EdgeInsets.only(
-                    top: nOfAttachmentWidgets > 0 ? (topPadding) : (topPadding),
+                          top: nOfAttachmentWidgets > 0
+                              ? (topPadding)
+                              : (topPadding),
                         ),
-                  decoration: _buildBoxDecoration(
+                        decoration: _buildBoxDecoration(isMyMessage,
-                      isMyMessage, isLastUser || nOfAttachmentWidgets > 0),
+                            isLastUser || nOfAttachmentWidgets > 0),
                         padding: EdgeInsets.all(10),
                         constraints: BoxConstraints.loose(Size.fromWidth(300)),
                         child: MarkdownBody(
@@ -264,18 +273,22 @@ class _MessageWidgetState extends State<MessageWidget>
                           onTapLink: (link) {
                             _launchURL(link);
                           },
-                    styleSheet: MarkdownStyleSheet.fromTheme(Theme.of(context)),
+                          styleSheet:
+                              MarkdownStyleSheet.fromTheme(Theme.of(context)),
                         ),
                       ),
                     ),
                   ],
                 ),
               ],
+            ),
+          ),
+        ],
       );
     }
 
     return GestureDetector(
-        child: IntrinsicWidth(child: column),
+        child: column,
         onLongPress: () {
           _showMessageBottomSheet(context);
         });