message: dont allow whitespace in room sub lists while resizing
diff: @@ -83,7 +83,7 @@ module.exports = React.createClass({
  this._layoutSections = [];
  const unfilteredOptions = {
  - allowWhitespace: true,
  + allowWhitespace: false,
  handleHeight: 1,
  };
  this._unfilteredlayout = new Layout((key, size) => {
  