Preserve font size preferences

[davidhoness]

I've just noticed that my font size preference is not preserved between site visits. Not sure if this is intentional or not but thought I would report it anyway.

[eah13]

@davidhoness good thought.

It seems that if we implemented this, users would want to have font size preferences maintained trinket-by-trinket, to avoid having all trinkets appear in huge text after, eg, giving a presentation. Does that seem right to you?

[davidhoness]

Yes, trinket by trinket makes sense.