Largely cosmetic changes to tablet

[md8n]

This is a grab-bag of largely cosmetic changes - better ways of writing things etc.

There are some things that are commented out, because they just aren't used anywhere, unless something really funky is being done somewhere else - eval is 'evil' - that kind of thing (actually pretty much that kind of thing only)

The idea behind this is to try and winkle out what merge issues might be bringing that double declared function back into tablet.js that and - "this breaks nothing":tm: