Properties popup behavior changes

In the video below, see that after opening the Note popup and clicking the Head tab, the whole section scrolls up to make room for the popup to fit on the screen. When closing the popup, properties scrolls back to eliminate the extra space created by the scroll.

https://github.com/user-attachments/assets/62276291-0c7c-4f06-aa3b-cd8f9883a693

Also, popups should be able to overlap bottom-docked panels. They resist doing so unless there's no more room at the top of the screen for them to extend to, as seen here:

https://github.com/user-attachments/assets/c5370669-cbcb-4b40-a8a0-ede77ea20aad

Expected behavior instead:

1. If scrolling to open a popup creates extra space at the bottom of the side panel, leave the space there after closing the popup until the user manually scrolls back up OR they switch to another tab and switch back
2. Popups coming from side panels should be able to extend over any open bottom-docker panels (like the Mixer)