Set `resize: vertical` for textareas (#11010)

GitOrigin-RevId: 1fffad2b35937a9b44440b1007526df266fcf255

services/web/frontend/stylesheets/core/scaffolding.less

@@ -58,6 +58,11 @@ textarea {
   line-height: inherit;
 }
 
+// Keep textarea within horizontal container when resizing
+textarea {
+  resize: vertical;
+}
+
 // Links
 
 a {