When a quickpick has more items than can fit into the initial list, it's not obvious there are hidden items that need to be scrolled into view. The current visual treatment is a very subtle scrollbar flash when the quickpick is first opened, but thereafter there is no visual indication that there are more items.

The current behavior presents issues for the remote indicator menu, which displays actions from all installed remote extensions (connect to host, create new codespace) etc. The remote indicator menu is meant to improve discoverability and ease of access to remote actions, and the current truncation inhibits discoverability of those remote actions.

Proposals:

1. render a 🔽 arrow button at the bottom of the quickpick when there are items offscreen which will scroll down to the next 'page' of items when clicked
2. always render the scrollbar