(fixed)Using sv-helper would hide the visibility of original element

[sankalplakhina]

On using sv-helper directive, the original item in repeat array gets a .sv-visibility-hidden class. On drop of this item to new position, this class was not removed due to which the original item stays dissapeared and seems like to be deleted or gone from the DOM.

Fixed this by removing the class on move execution completion.

[kamilkp]

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