Add start live survey button on responses page

ui/src/components/StartStopLiveSurvey.svelte

@@ -0,0 +1,31 @@
+<script>
+ import { createEventDispatcher } from 'svelte';
+
+ const dispatch = createEventDispatcher();
+
+ let className = '';
+ export { className as class };
+
+ export let survey = null;
+</script>
+
+{#if survey.direct !== null}
+    <a href="surveys/{survey.id}/live" class="btn btn-danger ms-1 float-end" title="Aller au direct"><i class="bi bi-film"></i></a>
+    <button
+        type="button"
+        class="btn btn-primary {className}"
+        title="Terminer le direct"
+        on:click={() => dispatch('end')}
+    >
+        <i class="bi bi-align-end"></i>
+    </button>
+{:else}
+    <button
+        type="button"
+        class="btn btn-primary {className}"
+        title="Commencer le direct"
+        on:click={() => {survey.shown = true; survey.direct = 0; survey.start_availability = new Date(); survey.end_availability = new Date(Date.now() + 43200000); survey.save().then(() => dispatch('update'));}}
+    >
+        <i class="bi bi-align-start"></i>
+    </button>
+{/if}