[O] quickly toggling properties

[Matt Price]

Hi everyone,

I just updated to the latest git to try out the ox-deck exporter --
wow it's great, thank you Rick!

The exporter makes use of two properties to control the display of
slide fragments -- STEP and HTML_CONTAINER_CLASS.  I think I'm going
to be using these a lot, so I'm wondering what the quickest way is to
toggle a property. It's easy enough to define a quick key I guess, by
adding this line to org-structure-templates-alist:

("s" ":Properties"\n:STEP: t\n:END:\n")

But I would like to bind a function to a siple keystroke, whic hI can
use to toggle the STEP or HTM_CONTAINER_CASS properties without
thinking too hard.  Any suggestions?  Thanks!

matt