Add warning to users

src/routes/private/events/creator/finish/+page.svelte

@@ -169,7 +169,8 @@
 
 <!-- Sending Emails -->
 <div class="rounded border border-gray-300 bg-white p-4">
-	<h2 class="mb-2 text-xl font-bold">Sending emails</h2>
+	<h2 class="mb-1 text-xl font-bold">Sending emails</h2>
+	<p class="text-sm text-red-500 mb-2">After pressing send, you must not exit this window until the mail are all sent!</p>
 	{#if email_status === StepStatus.Waiting}
 		<div class="flex items-center justify-between">
 			<span class="text-black-600">Waiting...</span>
@@ -179,7 +180,7 @@
 				class="ml-4 px-6 py-2 rounded font-semibold transition disabled:opacity-50 disabled:cursor-not-allowed
 					{event_status === StepStatus.Success && participants_status === StepStatus.Success ? 'bg-blue-600 hover:bg-blue-700 text-white' : 'bg-gray-400 text-white'}"
 			>
-				Launch Mail Campaign
+				Send all emails
 			</button>
 		</div>
 	{:else}