[web] Fix genre not being displayed correctly depending on the media kind

The genre is not displayed depending on the media kind and not only for the "music" kind.

web-src/src/locales/de.json

@@ -313,7 +313,8 @@
       },
       "tabs": {
         "authors": "Autoren",
-        "audiobooks": "Hörbücher"
+        "audiobooks": "Hörbücher",
+        "genres": "Genres"
       }
     },
     "browse": {

web-src/src/locales/en.json

@@ -313,7 +313,8 @@
       },
       "tabs": {
         "authors": "Authors",
-        "audiobooks": "Audiobooks"
+        "audiobooks": "Audiobooks",
+        "genres": "Genres"
       }
     },
     "browse": {

web-src/src/locales/fr.json

@@ -313,7 +313,8 @@
       },
       "tabs": {
         "authors": "Auteurs",
-        "audiobooks": "Livres audio"
+        "audiobooks": "Livres audio",
+        "genres": "Genres"
       }
     },
     "browse": {

web-src/src/locales/zh.json

@@ -313,7 +313,8 @@
       },
       "tabs": {
         "authors": "作者",
-        "audiobooks": "有声读物"
+        "audiobooks": "有声读物",
+        "genres": "流派"
       }
     },
     "browse": {