[mirotalksfu] - improve transcription UI, add persistent mode

public/js/LocalStorage.js

@@ -18,7 +18,8 @@ class LocalStorage {
         this.SFU_SETTINGS = {
             share_on_join: true, // popup message on join
             show_chat_on_msg: true, // show chat on new message
-            show_transcript_on_msg: true, // show transcript on new message
+            transcript_persistent_mode: false, // Prevent stop transcript in case of no-speech
+            transcript_show_on_msg: true, // show transcript on new message
             speech_in_msg: false, // speech incoming message
             moderator_audio_start_muted: false, // Everyone starts muted in the room
             moderator_video_start_hidden: false, // Everyone starts hidden in the room