Fix bug that prevented editing alt-text

* If there was already an uploaded file, it doesn't get re-uploaded when editing, and doesn't show up in request.FILES. The file name is still in thought.media so we can use that to tell if there's a image and if we should allow media_alt

main/templates/whispermaphone/post.html

@@ -88,7 +88,6 @@
         }
     });
 
-
     const mediaInput = document.getElementById("id_media");
     const mediaAlt = document.getElementById("id_media_alt");
     const clearCheckbox = document.getElementById("media-clear_id");

main/views.py

@@ -143,8 +143,9 @@ def post(request):
                                 ], check=True)
                 os.remove(os.path.join(settings.MEDIA_ROOT, f"{thought.uuid}.m4a"))  # Remove the original file
                 thought.media.name = f"{thought.uuid}.aac"  # Update the file in the DB
-        else:
-            # We need to make sure that if we remove an image, the alt text is removed with it
+
+        # We need to make sure that if we remove an image, the alt text is removed with it
+        if not thought.media:
             thought.media_alt = ""
 
         # Save for real