Language German translation for XenForo 2.3

• Sprachfile für XenForo 2.2.
• Verschiedene Anpassungen im Admin-CP.
• Die Phrasen für die Datenschutzerklärung und die Forenregeln müssen an das eigene Forum angepasst werden.

the following phrases have been updated:

• alternative_upgrade_xenforo_x
• bb_code_help_icode_example
• following_issue_found_one_click_upgrade_x
• full_image
• if_any_users_have_active_upgrades_recommend_disable
• note_paypal_subscriptions_can_only_be_canceled_from_your_paypal_account
• one_click_upgrade_explain
• option_explain.emailWatchedThreadIncludeMessage
• prefix_search
• style_prop_desc.fixedMessage
• style_prop_desc.memberTooltipHeader
• style_prop_desc.pageNavStyle
• this_payment_profile_is_no_longer_active_so_it_cannot_be_edited
• upgrade_to_x
• widget_def_desc.forum_statistics
• xenforo_version_x_available_for_installation
• xf_one_click_upgrade_significant_explain
• you_have_exceeded_maximum_number_of_selectable_items

• new phrases of XenForo 2.2.5 translated