Fixed: Added Various Missing Translations

cleanup en.json of unused translates

Fixes #1397

Closes Sonarr PR # 4791 'Fixed: Better wording of MissingFromDisk'

frontend/src/Components/Filter/Builder/FilterBuilderModalContent.js

@@ -8,6 +8,7 @@ import ModalContent from 'Components/Modal/ModalContent';
 import ModalFooter from 'Components/Modal/ModalFooter';
 import ModalHeader from 'Components/Modal/ModalHeader';
 import { inputTypes } from 'Helpers/Props';
+import translate from 'Utilities/String/translate';
 import FilterBuilderRow from './FilterBuilderRow';
 import styles from './FilterBuilderModalContent.css';
 
@@ -165,7 +166,9 @@ class FilterBuilderModalContent extends Component {
             </div>
           </div>
 
-          <div className={styles.label}>Filters</div>
+          <div className={styles.label}>
+            {translate('Filters')}
+          </div>
 
           <div className={styles.rows}>
             {