implemented adding required tasks to task

frontend/src/routes/task/View.svelte

@@ -12,6 +12,7 @@
     import PermissionEditor from '../../Components/PermissionEditor.svelte';
     import Notes            from '../notes/RelatedNotes.svelte';
     import StateSelector    from '../../Components/StateSelector.svelte';
+    import RequiredTasks    from './RequiredTasks.svelte';
     import TagList          from '../tags/TagList.svelte';
     import TaskList         from './TaskList.svelte';
 
@@ -301,6 +302,14 @@
                 <input type="number" bind:value={task.estimated_time} onchange={() => update({estimated_time:task.estimated_time})} />&nbsp;h
             </td>
         </tr>
+        <tr>
+            <th>
+                {t('depends_on')}
+            </th>
+            <td>
+                <RequiredTasks {task} />
+            </td>
+        </tr>
         {/if}
         <tr>
             <th>