disable subject field when posting

CHANGELOG.md

@@ -30,6 +30,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Newlines in the muted words settings work again
 - Clicking on non-latin hashtags won't open a new window
 - Uploading and drag-dropping multiple files works correctly now.
+- Subject field now appears disabled when posting
 
 ## [2.0.3] - 2020-05-02
 ### Fixed

src/components/post_status_form/post_status_form.vue

@@ -81,6 +81,7 @@
             v-model="newStatus.spoilerText"
             type="text"
             :placeholder="$t('post_status.content_warning')"
+            :disabled="posting"
             class="form-post-subject"
           >
         </EmojiInput>