Fix hidden hyperlink images in Gerrit
Fix hidden hyperlink images in Gerrit

Some hyperlinks in Gerrit use background images (why God why?!).  An example is any 'X' link to delete something.  Lets unhide these.

Fixes bug 974413

Change-Id: I851a407750bc0ef70969a897b125861d0106da80

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins