message: Add tooltips to rotate and close buttons in ImageView
diff: @@ -195,13 +195,13 @@ export default class ImageView extends React.Component {
  <img src={this.props.src} title={this.props.name} style={effectiveStyle} className="mainImage" />
  <div className="mx_ImageView_labelWrapper">
  <div className="mx_ImageView_label">
  - <AccessibleButton className="mx_ImageView_rotateCounterClockwise" onClick={ this.rotateCounterClockwise }>
  + <AccessibleButton className="mx_ImageView_rotateCounterClockwise" title="Rotate Left" onClick={ this.rotateCounterClockwise }>
  <img src={require("../../../../res/img/rotate-ccw.svg")} alt={ _t('Rotate counter-clockwise') } width="18" height="18" />
  </AccessibleButton>
  - <AccessibleButton className="mx_ImageView_rotateClockwise" onClick={ this.rotateClockwise }>
  + <AccessibleButton className="mx_ImageView_rotateClockwise" title="Rotate Right" onClick={ this.rotateClockwise }>
  <img src={require("../../../../res/img/rotate-cw.svg")} alt={ _t('Rotate clockwise') } width="18" height="18" />
  </AccessibleButton>
  - <AccessibleButton className="mx_ImageView_cancel" onClick={ this.props.onFinished }>
  + <AccessibleButton className="mx_ImageView_cancel" title="Close" onClick={ this.props.onFinished }>
  <img src={require("../../../../res/img/cancel-white.svg")} width="18" height="18" alt={ _t('Close') } />
  </AccessibleButton>
  <div className="mx_ImageView_shim">
  