Code review comment for lp://staging/~justinmcp/oxide/cursor-support

Hi. I can't find a definitive answer to your question about UpdateCursor()
and non-desktop platforms. Browsing the code doesn't reveal any special
casing, but maybe I've missed something.

If you're concerned about the overhead; I've made a change to store the
FormFactor in a static variable, it should cause no problems in this
circumstance and avoid overhead on subsequent calls.

I've also made the changes to match changes in upstream.