Rename legacy PleromaFE Chat functionality to "Shout"

src/components/features_panel/features_panel.js

@@ -2,7 +2,7 @@ import fileSizeFormatService from '../../services/file_size_format/file_size_for
 
 const FeaturesPanel = {
   computed: {
-    chat: function () { return this.$store.state.instance.chatAvailable },
+    shout: function () { return this.$store.state.instance.shoutAvailable },
     pleromaChatMessages: function () { return this.$store.state.instance.pleromaChatMessagesAvailable },
     gopher: function () { return this.$store.state.instance.gopherAvailable },
     whoToFollow: function () { return this.$store.state.instance.suggestionsEnabled },

src/components/features_panel/features_panel.vue

@@ -8,8 +8,8 @@
       </div>
       <div class="panel-body features-panel">
         <ul>
-          <li v-if="chat">
-            {{ $t('features_panel.chat') }}
+          <li v-if="shout">
+            {{ $t('features_panel.shout') }}
           </li>
           <li v-if="pleromaChatMessages">
             {{ $t('features_panel.pleroma_chat_messages') }}