Refactored seeking for the same behavior when clicking as calling skip()
Refactored seeking for the same behavior when clicking as calling skip()

ale-grosselle/wavesurfer.js,katspaugh/wavesurfer.js,ale-grosselle/wavesurfer.js,ffxsam/wavesurfer.js,katspaugh/wavesurfer.js,agamemnus/wavesurfer.js,agamemnus/wavesurfer.js,ffxsam/wavesurfer.js