message: switch to using <span/> for edit button
diff: @@ -263,7 +263,7 @@ module.exports = WithMatrixClient(React.createClass({
  // The window X and Y offsets are to adjust position when zoomed in to page
  var x = buttonRect.right + window.pageXOffset;
  - var y = (buttonRect.top + (e.target.height / 2) + window.pageYOffset) - 19;
  + var y = (buttonRect.top + (buttonRect.height / 2) + window.pageYOffset) - 19;
  var self = this;
  ContextualMenu.createMenu(MessageContextMenu, {
  chevronOffset: 10,
  @@ -465,7 +465,7 @@ module.exports = WithMatrixClient(React.createClass({
  }
  var editButton = (
  - <img className="mx_EventTile_editButton" src="img/icon_context_message.svg" width="19" height="19" alt="Options" title="Options" onClick={this.onEditClicked} />
  + <span className="mx_EventTile_editButton" title="Options" onClick={this.onEditClicked} />
  );
  var e2e;
  