width of edit input fixed on using grammarly plugin (#30298)

webapp/channels/src/sass/components/_post.scss

@@ -1193,8 +1193,12 @@
         margin: 0 auto;
         table-layout: fixed;
 
-        > div {
+        .post__img,
+        .post__header-body {
             display: table-cell;
+        }
+
+        > div {
             vertical-align: top;
         }
     }