Settings it translation: transparent recent panel

Added strings for the new merged commit about the recent
panel background transparency

Change-Id: If1cce8a78b8ea516e59962918f32c0e21d1158fc
Settings FR translation: Recents panel background

Change-Id: I7d72d313ed6c99dbc3cb666c046aaa82d2456ae3
Settings: ES translations

Change-Id: I396bc7c142191a1be857f0cb5f5287fa3f582c0c