Columntemplate: Hide/Show link on itemmouseenter/itemmouseleave

Hi!

I intend to show and hide a link (or image) on a columntemplate on itemmouseenter/itemmouseleave.

Tried to implement the following example with adaptations, but without success.

http://ift.tt/1tdWLV3

My Fiddle:

http://ift.tt/1yjMgjp

What better way to do this?

Another question: how to remove the grid horizontal scroll?

Thanks in advance.

Columntemplate: Hide/Show link on itemmouseenter/itemmouseleave