[web-src] Reduce size of empty search result message

web-src/src/templates/ContentText.vue

@@ -0,0 +1,20 @@
+<template>
+  <section class="section fd-content py-3">
+    <div class="container">
+      <div class="columns is-centered">
+        <div class="column is-four-fifths">
+          <slot name="content"></slot>
+        </div>
+      </div>
+    </div>
+  </section>
+</template>
+
+<script>
+export default {
+  name: 'ContentText'
+}
+</script>
+
+<style>
+</style>