[hub][vue] add empty state and dynamic publish button

erpnext/public/js/hub/components/NotificationMessage.vue

@@ -0,0 +1,20 @@
+<template>
+	<div class="subpage-message">
+        <p class="text-muted flex">
+            <span v-html="message"></span>
+            <i class="octicon octicon-x text-extra-muted"></i>
+        </p>
+    </div>
+</template>
+
+<script>
+
+export default {
+	name: ' notification-message',
+	props: {
+		message: String,
+	}
+}
+</script>
+
+<style scoped></style>