iOS: Bring back pinning Projects & Tags to the navigation bar (or add favourites)

After the latest iOS update, we can no longer pin Projects or Tags to the navigation bar. This was a really useful way to jump straight into the projects and tags I use every day, and losing it has added extra taps to my daily workflow.

Please bring that feature back. If pinning to the navigation bar isn't possible in the new design, at the very least we should be able to mark Projects and Tags as favourites so they stay accessible from one place instead of having to navigate through the full list every time.