message: Alphabetize attributes
  Another quick follow-up to:
diff: @@ -323,8 +323,8 @@ export class GraphiQL extends React.Component {
  this.editorBarComponent = n;
  }}
  className="editorBar"
  - onMouseDown={this.handleResizeStart}
  - onDoubleClick={this.handleResetResize}>
  + onDoubleClick={this.handleResetResize}
  + onMouseDown={this.handleResizeStart}>
  <div className="queryWrap" style={queryWrapStyle}>
  <QueryEditor
  ref={n => {
  @@ -377,8 +377,8 @@ export class GraphiQL extends React.Component {
  <div className={docExplorerWrapClasses} style={docWrapStyle}>
  <div
  className="docExplorerResizer"
  - onMouseDown={this.handleDocsResizeStart}
  onDoubleClick={this.handleDocsResetResize}
  + onMouseDown={this.handleDocsResizeStart}
  />
  <DocExplorer
  ref={c => {
  