Allow default media controls to be hidden.

src/localize/languages/en.json

@@ -84,6 +84,7 @@
     },
     "common": {
       "controls": {
+        "builtin": "Built-in video controls",
         "filter": {
           "editor_label": "Media Filter",
           "mode": "Filter mode",

src/localize/languages/it.json

@@ -84,6 +84,7 @@
     },
     "common": {
       "controls": {
+        "builtin": "",
         "filter": {
           "editor_label": "Filtro multimediale",
           "mode": "Modalità filtro",

src/localize/languages/pt-BR.json

@@ -84,6 +84,7 @@
     },
     "common": {
       "controls": {
+        "builtin": "",
         "filter": {
           "editor_label": "Filtro de Mídia",
           "mode": "Modo do filtro",

src/localize/languages/pt-PT.json

@@ -84,6 +84,7 @@
     },
     "common": {
       "controls": {
+        "builtin": "",
         "filter": {
           "editor_label": "Editor de titulos",
           "mode": "Modo",