Turn on/off ALL selected layers with "Space" button

[MrChebur]

Feature description.
It would be convenient to turn on/off all selected layers by pressing the space bar.

In the layers panel, you can select and deselect a single layer using the "Space" button, but if you select multiple layers, pressing the Space bar turns on / off only one of them.

You can enable / disable selected layers using the “Manage Map Theme” and even create a keyboard shortcut for this, but you need to assign two keys (1 - turn on, 2 - turn off) to perform this action, which is inconvenient.

Additional context
Current behavior while pressing "Space" while few layers are selected:

GIS SE question about this issue:
https://gis.stackexchange.com/questions/347754/how-to-turn-on-off-all-selected-layers-in-qgis-3

[MrChebur]

@m-kuhn When implementing this functionality, was it intentionally made so that when you press the spacebar on the selected layer that is in the group - the group layer does not become visible (the same actions, but using the mouse leads to a different result)? #38259