Document the -s flag

[damithc]

A -s flag was added to the CLI in #440
This flag doesn't seem to be documented in user docs.

[ang-zeyu]

In the options panel, I organised the options under commands during #1038 as the list was getting long. Maybe we could use a table instead =O

[damithc]

In the options panel, I organised the options under commands during #1038 as the list was getting long. Maybe we could use a table instead =O

I'm OK with either format. The downside of the panel is that it requires an extra click (and gets in the way of locating an option using CTRL+F)