Enable turn on/off Favorites/Loved feature. (#917)

* Added option to enable/disable favorites in Song

* Added option to enable/disable favorites in Artist

* Added option to enable/disable favorites in Albums and Favorites tab in sidebar

* Added option to enable/disable favorites in Player

* Set default value of enableFavourites as true

* Improved the functionality to enable/disable Favorites

* Add `EnableFavourites` config option

Co-authored-by: Deluan <deluan@navidrome.org>

ui/src/album/albumLists.js

@@ -4,6 +4,7 @@ import VideoLibraryIcon from '@material-ui/icons/VideoLibrary'
 import RepeatIcon from '@material-ui/icons/Repeat'
 import AlbumIcon from '@material-ui/icons/Album'
 import FavoriteIcon from '@material-ui/icons/Favorite'
+import config from '../config'
 
 export default {
   all: {
@@ -11,10 +12,12 @@ export default {
     params: 'sort=name&order=ASC',
   },
   random: { icon: ShuffleIcon, params: 'sort=random' },
-  starred: {
-    icon: FavoriteIcon,
-    params: 'sort=starred_at&order=DESC&filter={"starred":true}',
-  },
+  ...(config.enableFavourites && {
+    starred: {
+      icon: FavoriteIcon,
+      params: 'sort=starred_at&order=DESC&filter={"starred":true}',
+    },
+  }),
   recentlyAdded: {
     icon: LibraryAddIcon,
     params: 'sort=recently_added&order=DESC',