Various fixes (#116)

* Fix missing translations in translator popup

* Disable annotator for PDFs for now, closes #115

* Fix triangle in shadow of popup making it darker

apps/readest-app/src/components/Popup.tsx

@@ -21,7 +21,7 @@ const Popup = ({
 }) => (
   <div>
     <div
-      className={`triangle text-base-200 absolute z-10 ${triangleClassName}`}
+      className={`triangle text-base-200 absolute z-40 ${triangleClassName}`}
       style={{
         left:
           trianglePosition?.dir === 'left'