feat: follow pull requests from mobile Search (Closes #1307)

frontend/index.html

@@ -2016,7 +2016,7 @@
       <button data-mobile-queue="delivery" type="button"><span><strong>Delivery</strong><small>Needs recovery</small></span><span data-mobile-queue-count="delivery">0</span></button>
       <button data-mobile-queue="attention" type="button"><span><strong>Attention</strong><small>Needs a response</small></span><span data-mobile-queue-count="attention">0</span></button>
       <button data-mobile-queue="update" type="button" aria-label="Updates, 0 unread conversations"><span><strong>Updates</strong><small>Unread conversations</small></span><span data-mobile-queue-count="update">0</span></button>
-      <button data-mobile-queue="following" type="button" aria-label="Following, 0 watched issues"><span><strong>Following</strong><small>Issues you watch</small></span><span data-mobile-queue-count="following">0</span></button>
+      <button data-mobile-queue="following" type="button" aria-label="Following, 0 unseen changes"><span><strong>Following</strong><small>Issues and pull requests you watch</small></span><span data-mobile-queue-count="following">0</span></button>
       <button data-mobile-queue="filed" type="button"><span><strong>Filed</strong><small>Issues you delegated</small></span><span data-mobile-queue-count="filed">0</span></button>
       <button data-mobile-queue="later" type="button"><span><strong>Later</strong><small>Deferred work</small></span><span data-mobile-queue-count="later">0</span></button>
       <button data-mobile-queue="draft" type="button"><span><strong>Drafts</strong><small>Unfiled captures</small></span><span data-mobile-queue-count="draft">0</span></button>