We'll consider it in the future, possibly when we redo the windowing system so we can have multiple windows.
FWIW, I've been using a tool called Active Captions (version 1.5) for maybe 15 years. I can't seem to find the original author, but this looks like it (please note I haven't verified this site is safe to download from):
https://active-captions.software.informer.com/
Among a few other things, it lets you put any window into the system tray by right clicking the minimize button, so it doesn't take up space on your taskbar. Unfortunately it doesn't work for Spine because Spine doesn't use the standard minimize button.