The sad answer is: "There is no simple way to bring it back."
I've tested it in different ways, but it also didn't work.
This ability was completely removed from the Actionmap. To edit the Actionmap you will need the sourcecode of LiF.
An ather way is to mod it with the scripts of Custodian's BazilMod. With this mod you can get new abilities with specific moduls.
But this is a workaround and i have no clue how exact you should do this.
More informations here