Add confirm dialog to reminder button.

Add a show function in alertStore so we can use alerts in a defined way everywhere.
#12 #33

routes/api.php

@@ -28,8 +28,8 @@
 
 Route::get('/invoices/{id}/remind', function ($id) {
     $invoice = InvoiceController::single($id);
-    // Mail::to('daniel@vollstock.de')->send(new Reminder($invoice));
-    return new Reminder($invoice);
+    Mail::to('daniel@vollstock.de')->send(new Reminder($invoice));
+    // return new Reminder($invoice);
 });
 
 Route::get('/offers/{id}/confirm', function ($id) {