message: avoid horizontal scrollbar in composer when placeholder doesn't fit
diff: @@ -107,7 +107,8 @@ limitations under the License.
  width: 100%;
  max-height: 120px;
  min-height: 19px;
  - overflow: auto;
  + overflow-y: auto;
  + overflow-x: hidden;
  word-break: break-word;
  }
  