Bugfix: send test message button not showing if there is no profile picture

resources/js/components/auth/hookActions/DiscordWebhookMessageComponent.vue

@@ -209,7 +209,7 @@
                 <span uk-icon="check"></span>
                 Save
             </button>
-            <button class="uk-button uk-button-default" @click="sendTestMessage" v-if="avatarPreview && !avatarPreview.startsWith('data:image')">
+            <button class="uk-button uk-button-default" @click="sendTestMessage" v-if="!avatarPreview || !avatarPreview.startsWith('data:image')">
                 <span uk-icon="forward"></span>
                 Send test message
             </button>