Add PvP Talents functionality

[FuryusSvetlo]

Add functionality to save/restore PvP Talents.

Also minor updates to locales files:

• add message to each file for PvP Talents (even if no translation)
• added one translation to the deDE locale file for msg_found_by_name

These locale files originated from the CurseForge / Twitch software rather from from the GitHub master.