Add 5-star rating system(#986)

* Added Star Rating functionality for Songs

* Added Star Rating functionality for Artists

* Added Star Rating functionality for AlbumListView

* Added Star Rating functionality for AlbumDetails and improved typography for title

* Added functionality to turn on/off Star Rating functionality for Songs

* Added functionality to turn on/off Star Rating functionality for Artists

* Added functionality to turn on/off Star Rating functionality for Albums

* Added enableStarRating to server config

* Resolved the bugs and improved the ratings functionality.

* synced repo and removed duplicate key

* changed the default rating size to small, and changed the color to match the theme.

* Added translations for ratings, and Top Rated tab in side menu.

* Changed rating translation to topRated in albumLists, and added has_rating filter to topRated.

* Added empty stars icon to RatingField.

* Added sortable=false in AlbumSongs and added sortByOrder=DESC in all List components.

* Added translations for rating, for artists and albums, and removed the sortByOrder=DESC from SimpleLists.

ui/src/common/ArtistSimpleList.js

@@ -7,7 +7,8 @@ import ListItemSecondaryAction from '@material-ui/core/ListItemSecondaryAction'
 import ListItemText from '@material-ui/core/ListItemText'
 import { makeStyles } from '@material-ui/core/styles'
 import { sanitizeListRestProps } from 'ra-core'
-import { ArtistContextMenu } from './index'
+import { ArtistContextMenu, RatingField } from './index'
+import config from '../config'
 
 const useStyles = makeStyles(
   {
@@ -48,7 +49,17 @@ export const ArtistSimpleList = ({
                 <ListItem className={classes.listItem} button={true}>
                   <ListItemText
                     primary={
-                      <div className={classes.title}>{data[id].name}</div>
+                      <>
+                        <div className={classes.title}>{data[id].name}</div>
+                        {config.enableStarRating && (
+                          <RatingField
+                            record={data[id]}
+                            source={'rating'}
+                            resource={'artist'}
+                            size={'small'}
+                          />
+                        )}
+                      </>
                     }
                   />
                   <ListItemSecondaryAction className={classes.rightIcon}>