feat: track multiple mobile releases (Closes #1094)

frontend/index.html

@@ -322,11 +322,12 @@
   </section>
   <dialog class="release-receipt-sheet" id="release-receipt-sheet" aria-labelledby="release-receipt-title">
     <section class="release-receipt-panel">
-      <header><div><p class="small muted">Exact merge evidence</p><h2 id="release-receipt-title">Release progress</h2></div><button id="close-release-receipt" type="button">Close</button></header>
+      <header><div><p class="small muted">Exact merge evidence</p><h2 id="release-receipt-title">Release watchlist</h2></div><button id="close-release-receipt" type="button">Close</button></header>
       <p id="release-receipt-status" role="status" aria-live="polite">Checking the exact merge commit…</p>
       <p class="small" id="release-receipt-checks"></p>
       <a class="button-link" id="release-receipt-link" href="" hidden>Open release</a>
-      <div class="release-receipt-actions"><button id="refresh-release-receipt" type="button">Refresh</button><button id="dismiss-release-receipt" type="button">Dismiss</button></div>
+      <div class="release-watchlist" id="release-watchlist" aria-label="Tracked merges"></div>
+      <div class="release-receipt-actions"><button id="refresh-release-receipt" type="button">Refresh all</button><button id="dismiss-release-receipt" type="button">Clear all</button></div>
     </section>
   </dialog>
   <dialog class="agenda-export-sheet" id="agenda-export-sheet" aria-labelledby="agenda-export-title">