add option for users to make their favorites private

src/inc/locales/en.json

@@ -165,6 +165,8 @@
     "hide_item_ratings_hint": "Don't show SFW/NSFW rating indicators on main page items",
     "disable_swiping": "Disable Swiping",
     "disable_swiping_hint": "Disable swipe-to-navigate on mobile devices",
+    "favorites_private": "Private Favorites",
+    "favorites_private_hint": "Only you and administrators can view your favorites list.",
     "image_expand_on_click": "Expand images inline on click",
     "image_expand_on_click_hint": "Instead of opening the scroll zoom modal, clicking an image will expand it to full size within the page.",
     "enable_bg_blur": "Enable Background blur",
@@ -539,6 +541,7 @@
     "subscribe_uploads_btn": "Subscribe user to uploads",
     "no_uploads": "no uploads found",
     "no_favs": "no favorites",
+    "private_favorites": "private favorites",
     "back_to_profile": "Back to Profile",
     "ban_modal_title": "Ban User",
     "ban_modal_reason": "Reason:",