Refactor collection creation UI (#6485)

* Iteration, before functional component

* Use react-hook-form, shared form for new and edit

* Avoid negative margin on input prefix

* Centered now default for modals

app/menus/CommentMenu.tsx

@@ -38,7 +38,6 @@ function CommentMenu({ comment, onEdit, onDelete, className }: Props) {
   const handleDelete = React.useCallback(() => {
     dialogs.openModal({
       title: t("Delete comment"),
-      isCentered: true,
       content: <CommentDeleteDialog comment={comment} onSubmit={onDelete} />,
     });
   }, [dialogs, comment, onDelete, t]);