loading button dispose calls undefined method

[dirkpeters]

We've been having js errors while using the loadingbutton; a function called 'removeData' is called, but is not defined. When looking at the code in loading-button.js, we see the following snippet.

dispose() {
    Data.removeData(this._element, DATA_KEY)
    this._element = null
  }

Data (from dom/data.js) does not define 'removeData', it does define 'remove'.

[mrholek]

@dirkpeters thanks. I will address this issue in the next release.

[dirkpeters]

thanks!