[Glitch] Add the ability to edit media attachment metadata for any unattached media

Port 31005aad12 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/compose/containers/upload_container.js

@@ -5,7 +5,6 @@ import { submitCompose } from 'flavours/glitch/actions/compose';
 
 const mapStateToProps = (state, { id }) => ({
   media: state.getIn(['compose', 'media_attachments']).find(item => item.get('id') === id),
-  isEditingStatus: state.getIn(['compose', 'id']) !== null,
 });
 
 const mapDispatchToProps = dispatch => ({