Disable status preview in the chat posting form

src/components/chat/chat.vue

@@ -75,6 +75,7 @@
               :disable-polls="true"
               :disable-sensitivity-checkbox="true"
               :disable-submit="errorLoadingChat || !currentChat"
+              :disable-preview="true"
               :post-handler="sendMessage"
               :submit-on-enter="!mobileLayout"
               :preserve-focus="!mobileLayout"

src/components/post_status_form/post_status_form.js

@@ -41,6 +41,7 @@ const PostStatusForm = {
     'disablePolls',
     'disableSensitivityCheckbox',
     'disableSubmit',
+    'disablePreview',
     'placeholder',
     'maxHeight',
     'postHandler',

src/components/post_status_form/post_status_form.vue

@@ -70,7 +70,10 @@
           <span v-if="safeDMEnabled">{{ $t('post_status.direct_warning_to_first_only') }}</span>
           <span v-else>{{ $t('post_status.direct_warning_to_all') }}</span>
         </p>
-        <div class="preview-heading faint">
+        <div
+          v-if="!disablePreview"
+          class="preview-heading faint"
+        >
           <a
             class="preview-toggle faint"
             @click.stop.prevent="togglePreview"