Missing translation for Like application in notification emails

Preconditions:

• The Mail Sending should be configured
• An user exists and has an email address set in its profile
• Eventually, go to webapps\xwiki\WEB-INF\xwiki.properties and set notifications.emails.live.graceTime = 1 to enable the sending of e-mails after 1 minute. Make sure the line is not commented out (doesn't have an # at the start of it).

Steps to reproduce:

1. Log in as a simple user (with email address in the profile)
2. Click on the bell in the top right corner
3. Click on Settings, in the right side of Notifications
4. Set "Email Frequency" to Live
5. Set ON all the options in the Email column
6. Log in with another user or with Admin
7. Like a page

Expected results: An email is sent to the user that has the notifications set to ON, Live.

Actual results: An email is sent to the user that has the notifications set to ON, Live, but the Like app appears as "like.application.name"