Only render zoom out inserters on block selection

[richtabor]

Rendering the block inserters on hover as well as selection makes them feel quite fragile and disorienting, as they render quite a bit. I propose that the inserters are rendered only when selecting a section.

CleanShot.2024-09-30.at.12.29.51.mp4

[getdave]

This will need backporting to 6.7. I'll add to the board.

[draganescu]

Is this still an issue? My inserters only render when something is selected.

[jeryj]

Should have been closed by #65759