message: remove faulty onBlur/onFocus code which caused selection to rollback
diff: @@ -1544,18 +1544,6 @@ export default class MessageComposerInput extends React.Component {
  this.handleKeyCommand('toggle-mode');
  };
  - onBlur = (e) => {
  - this.selection = this.state.editorState.selection;
  - };
  -
  - onFocus = (e) => {
  - if (this.selection) {
  - const change = this.state.editorState.change().select(this.selection);
  - this.onChange(change);
  - delete this.selection;
  - }
  - };
  -
  focusComposer = () => {
  this.refs.editor.focus();
  };
  @@ -1601,8 +1589,6 @@ export default class MessageComposerInput extends React.Component {
  onChange={this.onChange}
  onKeyDown={this.onKeyDown}
  onPaste={this.onPaste}
  - onBlur={this.onBlur}
  - onFocus={this.onFocus}
  renderNode={this.renderNode}
  renderMark={this.renderMark}
  // disable spell check for the placeholder because browsers don't like "unencrypted"
  