Fix some bugs introduced by Interaction Mask component

[amanmahajan7]

• Fix Cell component export
• Fix columns count for Immutable list
• Fix cell styles
• Unselect selected cell when clicked outside the grid
• Fix drag exception in Internet explorer

Internet Explorer only supports 'text' and 'URL' for the 'type' argument. If you try setting type to anything else, IE will throw an exception.

• Fix performance regression in firefox. When the grid is scrolled to the middle then the drag fill operation is extremely slow. This is caused by this bug.

The problem comes from the fact that the item's container is shifted right with a CSS transformation (translateX). The ghost is positioned like there was no translation.

[amanmahajan7]

Replaced by
#1227
#1228
#1229