Add AUTHORIZED_FETCH disclaimer to Actor Profile error messages

outbox.css

@@ -3,3 +3,8 @@
   font-size: 0.875rem;
   text-align: center;
 }
+
+.other-activity {
+  color: var(--rdp-text-color);
+  font-size: 16px;
+}

outbox.js

@@ -170,6 +170,7 @@ class DistributedActivity extends HTMLElement {
   displayUnimplemented () {
     const message = `Activity type ${this.activityType} is not implemented yet.`
     const messageElement = document.createElement('p')
+    messageElement.classList.add('other-activity')
     messageElement.textContent = message
     this.appendChild(messageElement)
   }
@@ -220,13 +221,15 @@ class DistributedActivity extends HTMLElement {
     const to = this.activityData.object
     const message = `New follow request from ${from} to ${to}`
     const messageElement = document.createElement('p')
+    messageElement.classList.add('other-activity')
     messageElement.textContent = message
     this.appendChild(messageElement)
   }
 
   displayLikeActivity () {
     const message = `New like on ${this.activityData.object}`
     const messageElement = document.createElement('p')
+    messageElement.classList.add('other-activity')
     messageElement.textContent = message
     this.appendChild(messageElement)
   }