Quick and fun edit to quick-start tutorial

[lansingthomas]

Is your feature request related to a problem? Please describe.

• improving quick-start for new users, unfamiliar with certain notations.
• ongoing related work seems to be happening here: Add keyspec logic #3027
• this proposal helps solve some of the problems elaborated in 3027

Describe the solution you'd like
I would like to see a phrase appended to the third paragraph of the Commands section of the quick-start

"Commands can be called by name from the Execute-Command Menu :"
→
"Commands can be called by name from the Execute-Command Menu with (control + space):"

Describe alternatives you've considered
the alternative is to wait for 3027 to be resolved, though I don't see the harm in this proposal even if 3027 is resolved quickly.

Additional context
I think that this short addition will help people see that C-space and control + space are functionally the same (even though they might not be exactly the same... for other purposes)