Don't do two requests when expanding folders — radicle-explorer

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   const dispatch = createEventDispatcher<{ select: string }>();
   const onSelectFile = ({ detail: path }: { detail: string }) =>
     dispatch("select", path);
   const onClick = () => {
     expanded = !expanded;
     tree = fetchTree(prefix).then(tree => {
       if (expanded) return tree;
     });
   };
 </script>
 <style>

 </style>
 <!-- svelte-ignore a11y-click-events-have-key-events -->
 <div role="button" tabindex="0" class="folder" on:click={onClick}>
 <div
   role="button"
   tabindex="0"
   class="folder"
   on:click={() => {
     expanded = !expanded;
   }}>
   <div class="icon-container">
     {#if expanded}
       <IconSmall name="folder-open" />