Master issue for Table discussion

[andlabs]

This thread exists to collect all the requests for Table and coordinate merging the feature back into master now that I'm ready to focus attention on it.

This thread includes by proxy the discussion in #159.

@bcampbell what's your current status on your Table Windows code, and what does it do currently?

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Table will include Tree eventually, but not initially.

Requests from the Go side:

• Table column widths
• Checkbox part OnToggled
• Options to "activate" rows with double-clicks
• Consider also providing stripped-down listboxes like on Windows as an option (maybe)

Other requests:

• Hyperlink columns