Fixes two issues in IE11 for Anomaly Explorer:
- The format of the string returned from element.attr('transform') is different in IE11 so the regex based on it would fail. This fixes the issue and adds tests for the different formats. The code was also changed to gracefully return NaN in case the regex wouldn't return results, the previous version triggered a JS error.
- The migration of the swimlanes to React caused the cell selection to malfunction in IE11. This fixes it by updating the dragSelect library to use the new method setSelectables. The previous method we used (addSelectables) didn't play well with how React rerenders the swimlanes. Note this lib update using the new method will require to run yarn kbn bootstrap.
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