message: Give dialogs a matrixClient context
  Dialogs are mounted outside of the main react tree of MatrixChat,
  so they won't have its child context.
diff: @@ -17,9 +17,12 @@ limitations under the License.
  import React from 'react';
  import PropTypes from 'prop-types';
  +import { MatrixClient } from 'matrix-js-sdk';
  +
  import { KeyCode } from '../../../Keyboard';
  import AccessibleButton from '../elements/AccessibleButton';
  import sdk from '../../../index';
  +import MatrixClientPeg from '../../../MatrixClientPeg';
  /**
  * Basic container for modal dialogs.
  @@ -51,6 +54,20 @@ export default React.createClass({
  children: PropTypes.node,
  },
  + childContextTypes: {
  + matrixClient: PropTypes.instanceOf(MatrixClient),
  + },
  +
  + getChildContext: function() {
  + return {
  + matrixClient: this._matrixClient,
  + };
  + },
  +
  + componentWillMount() {
  + this._matrixClient = MatrixClientPeg.get();
  + },
  +
  _onKeyDown: function(e) {
  if (this.props.onKeyDown) {
  this.props.onKeyDown(e);
  