implemented editing of 'show closed tasks' setting in project

frontend/src/Components/MemberEditor.svelte

@@ -50,13 +50,12 @@
 {#if error}
 <span class="error">{error}</span>
 {/if}
-<table>
-    <tbody>
+<fieldset>
+    <legend>{t('members')}</legend>
+    <table>
+        <tbody>
         {#each sortedMembers as member,i}
         <tr>
-            {#if !i}
-            <th rowspan={sortedMembers.length}>{t('members')}</th>
-            {/if}
             <td>{member.user.name}</td>
             <td>
                 <PermissionSelector {permissions} selected={member.permission.code} onchange={(perm) => updatePermission(member.user.id,perm)} />
@@ -67,11 +66,10 @@
         </tr>
         {/each}
         <tr>
-            <td></td>
             <td>{t('add_member')}</td>
             <td>
                 <Autocomplete {getOptionsFor} {onSelect} />
             </td>
         </tr>
-    </tbody>
-</table>
+        </tbody>
+    </table></fieldset>