Add new base function, expose another one.
Add new base function, expose another one.

  * Add function to remove CSS class based on a DOM element
    class.
  * Expose check if element is ID.

Change-Id: I51afa4e1c2019b188b4cbbbfdbe127f05d0d815f

kernelci/kernelci-frontend,kernelci/kernelci-frontend,kernelci/kernelci-frontend,kernelci/kernelci-frontend