Update ctrl+f functionality in gnomAD browser

[ch-kr]

A few users in the 2024 user survey provided feedback that it would be helpful if ctrl+f would search all of the variants in a gene page (e.g., PCSK9) rather than just the variants displayed in the table at any given moment. Konrad pointed out that you can update the behavior of ctrl+f to search the contents of your webpage and provided the example that ctrl+f in Google docs searches all of the text in that doc rather than the just the bar at the top ("File", "Edit", "View", etc.); it would be great if we could update the behavior of ctrl+f on the gnomAD gene pages as well.