Find good way to avoid accidental press of backspace on a column

[helgoboss]

Pressing backspace on a column causes the track to be deleted. This can happen by accident. Too easily in my opinion.

Maybe ask for confirmation?

Or a more graceful way: When interacting with a slot (by recording or playing), automatically make it the active cell. It's a bit unintuitive that the previous selection (which might be the column itself) stays, currently.

In addition, we could make it more visible if the complete column is selected. E.g. through border or by also giving the upper column heading a background shade.