Add functionality to pin sources

src/modules/extension/Extensions.constants.ts

@@ -53,4 +53,5 @@ export const extensionLanguageToTranslationKey: { [state in ExtensionGroupState
     [DefaultLanguage.ALL]: 'extension.language.all',
     [DefaultLanguage.OTHER]: 'extension.language.other',
     [DefaultLanguage.LOCAL_SOURCE]: 'extension.language.other',
+    [DefaultLanguage.PINNED]: 'global.label.pinned',
 };

src/modules/extension/Extensions.utils.ts

@@ -49,7 +49,7 @@ export const isExtensionState = (value: string): boolean =>
 
 export const isExtensionStateOrLanguage = (languageCode: string): boolean =>
     isExtensionState(languageCode) ||
-    [DefaultLanguage.ALL, DefaultLanguage.OTHER, DefaultLanguage.LOCAL_SOURCE].includes(
+    [DefaultLanguage.ALL, DefaultLanguage.OTHER, DefaultLanguage.LOCAL_SOURCE, DefaultLanguage.PINNED].includes(
         languageCode as DefaultLanguage,
     );