I remember this being annoying - and didn’t realise it was still an issue which needs fixing.
Not really an answer but the reason I had forgotten about it was because I always have the panel expanded and the issue you describe is no longer an issue. I always have Wappler displaying 6 columns: 2 for SC, 2 for split view and 2 for App Structure etc. It saves such a lot of scrolling and searching for items. It 's a 43" monitor - well worth it for Wappler use alone (IMO).