add waiting on disabled button

styles/index.css

@@ -71,6 +71,10 @@
   @apply text-gray-800;
 }
 
+.ibtn:disabled {
+  @apply opacity-50 cursor-wait;
+}
+
 .btn {
   @apply font-bold py-2 px-4 rounded mx-2;
 }
@@ -103,6 +107,10 @@
   @apply bg-gray-700;
 }
 
+.btn:disabled {
+  @apply opacity-50 cursor-wait;
+}
+
 .link {
   @apply font-medium text-blue-500 underline;
 }