Changing var keyword to const

[haszankauna]

@TildaDares this is my pull request fixes #1086 Changed var keyword to const keyword in DistortableImage.ControlBar.js in line 28

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[TildaDares]

Congratulations on merging your PR @haszankauna 🎉

[7malikk]

Congratulations @haszankauna 🎉