Lots of fixes to "media threads"

src/components/messages/MessageOutgoingFile.vue

@@ -2,15 +2,14 @@
   <message-outgoing v-bind="{ ...$props, ...$attrs }" v-on="$listeners">
     <div class="bubble">
       <div class="original-message" v-if="inReplyToText">
-        <div class="original-message-sender">
-          {{ $t('message.user_said', {user: inReplyToSender || "Someone"}) }}
-        </div>
+        <div class="original-message-sender">{{ inReplyToSender }}</div>
         <div
           class="original-message-text"
           v-html="linkify($sanitize(inReplyToText))"
         />
       </div>
 
+
       <div class="message">
         <span>{{ $t('message.file_prefix') }}</span>
         <span