Review all keybindings before releasing 3.0

[aadcg]

Adding it as a reminder.

@aartaka advocated for rebinding set-action-on-return (ex return-selection-over-actions).

set-action-on-return (ex return-selection-over-action) should be bound to shift-return instead of M-return. The latter should be reserved for "strong" actions that close the prompt-buffer, analogous to return and C-return (return stands either for "activate this now" or "I'm done, commit this action" in CUA). If we dilute the responsibility one takes when pressing M-return, then the character of other actions bound to *-return will not be perceived as final and decisive for a given prompt.

[aartaka]

Maybe shift-return is too strong too, by the way!

[aadcg]

Any update here @aartaka? Do we still want to change this keybinding?

[aartaka]

I still think we should change the keybinding, and s-return sounds good.